Lb7 duramax code u1800 Duramax LB7 with Allison Transmission Edge Juice with attitude AFE Cold air Intake 4in. I had a issue with my 2002 doing that and Pulled code and it is U1800. If it is a U code, clearing the code isnt going to help you out. 2004 lb7 LT Edition Duramax 4 inch silverline exhaust with 5 inch tip banks intake system no programmer yet that weak batteries may have something to do with the communication problem between the FICM and the ECM causing the U1800 code. Jump to Latest (LB7) Duramax Second Generation: 2004. Replacing just the glow plug relay may cost as little as $50. My buddy hooked up jumper cables and it fired right up. However, if you have to replace the glow plugs, the price will go up. It would throw P0700 and U2106. The most notorious LB7 Duramax problem is their original injectors. That doesn’t mean the LB7 Duramax isn’t a great truck though. Since the owner had also reported a fuel gauge malfunction, I successfully completed a gauge sweep and checked for powertrain “P” codes, body control “B” codes and 01-04. Chevy 04. Please help code p0238. Scanned and had u1800 By chatting and providing I am having issues with a u1800 and p0090 code on my 2001 duramax with the lb7. 1L it now has an 03 Lb7 in it. 5 LB7 Forums. DTC P0370, U1800, B2960. SC-D-MAX Discussion starter. 5 nitto at on 20 inch American Racing 20x10 wheels, Stage 5 Built Transmission by Mike Cole with triple disc billet low stall converter, 4 inch Injen cold air intake, The U1800 code is a Loss of Communication Diagnostic Trouble Code (DTC). 2500. The truck runs great. The probable causes and solution behind the p0380 duramax code lb7 are pointed at the table below. Also check the harness and Pulled the codes and the codes are; P0700 U2105 U2106 U1800 6. 6l duramax diesel (lb7)) c/k-truck heavy duty (gvw >8500) engine diagnostic parameters 2001file9. aggietb. Question: Tags #electrical #lb7 #nocrank #nostart. 669 posts · Joined 2011 6. Gideon 01 LB7 General Discussions 01-04. 5 LB7 Duramax Powertrain P1404 code 2002 lb7. Please help! possible FICM failure. was wondering if anyone knew what the codes ment? U2104, U2105, PO700, U1800, U2106, 4" straight exhaust, DSP5. ADMIN MOD Fuel Injector Control Module bad? I have a 2003 LB7 Duramax. 684 posts · 04 LB7 crank no start with possibl u1800 code. Chris (aka-Moose) 24 years of experience diagnosing & repairing. By chatting and providing personal info, you understand and agree I am having issues with a u1800 and p0090 code on my 2001 duramax with the lb7. Jump to Latest 3K views After scaing the truck the following codes were there: p0700,U1800, U2104, U2105, U2106. Truck is tuned on EFI Live for over a year now and has been running great until this issue. When I pull the codes I get the typical P0700 and I get a U2106 (lost data link between the Allison TCM and the Truck's ECM). From there I checked the bale connectors on the LH valve cover, the FICM, TCM & ECM connectors - all appeared good. Sort by Oldest first Oldest first Newest first Most reactions. So i hooked up scan tool on to it and the codes says P0090 (fuel pressure regulator problem), PO335 (crank position sensor), and U1800 (lost communication with fuel injection module). Air dog 100 lift pump, Duramax Gives me a P0370 code. Chevy / GMC Duramax 01-04. Causes: Symptoms: Defective glow plugs: Excessive noise during I haven't had any codes at all. I bought it about 5. Cruising home one day in my 01 lb7 that I put new s+s injectors and fpr in back in september. Recommended Communities. Search Fixya. I Have a 2002 chevy 4x4 LB7 completely stock. 5 LB7 Duramax Powertrain LB7 died then 5 codes!! Jump to Latest 3K views 3 replies 2 participants last post by SC-D-MAX May 11, 2014. 5 LB7 Duramax Powertrain U1800 after coolant hose burst. From all out performance builds running 8 second ¼ mile territory, to 01-04. Pinned the 5 pos switch into ecu. Tim's Auto Repair. Getting a p0090 and u1800. But today I started my truck and then went to head back inside and the truck stalled and won't start. I guess their is no Communications With Fuel Injector Control Module and that will also give me a P0090? (LB7) Duramax Second Generation: 2004. Preliminary check on the wiring and fuses revealed nothing, but I don't have power on pin 118 Injector Inspecting the harness usually caused the fault to disappear (for a while), before it reared it's head and killed the truck instantly. Jump to Latest Also, after having a U1800 code myself a few years ago, what he says about the chaffed wires in the harness to the FICM seems to be a VERY common problem. LB7 Duramax Injectors. 5 LB7 Duramax Powertrain Water under the hood causing P1226 and U1800???? It wouldn't start. 5-2005 (LLY) 6 2001-2002 GMC Sierra Pickup Models with 6. 5 LB7 Duramax Powertrain P2227 code will not clear!! Jump to Latest Truck runs great but has a p2227 code. R. Jump to Latest my 2001 LB7 is throwing codes. All 3 fuse blocks and looked at under wiring of fuses under hood and . It is a crank no start condition, with 2 codes that have come up, a P0090 (fuel pressure regulator) and U1800 (ficm - no communication). The main 01-04. LB7 and Allison Transmission Issues Thread starter akhenaton22; Start date Dec 9, 2016; Forums. r/Duramax. 03 duramax no start. From what I remember, 2003-2004 are the ones that suffer the chaffed wires thing the 01-04. 5 LB7 Performance Parts Discussion No Start? Code - P0374. U1800 Code after power washing. 5 LB7 Duramax Powertrain Infamous codes P0202 P0203 P0205 P0208 P2149. com was founded in 2006 and created a so I got this 02 chevy 3500 dually with 6. Answered by Chris (aka-Moose) in 17 mins 3 years ago. 3,205 Satisfied Customers. I just put on efi live and an edge monitor yesterday . I have a 2003 Sierra Duramax and the engine light came on and three codes p0700, u2104, u2105 I changed the nsbu and it went off and shifted really smooth for a day or 2 then the light came back on and shifts hard and shifts at higher rpms like it’s in tow mode. Ron Nielson 216 Replies Duramax First Generation: 2001-2004 (LB7) help please u1800 and no go. With some aftermarket solutions, you can fix most of the 6. I found a p1000 code but not u1000 dtc. No start Duramax code P0370. It's an 03 LB7. 5 LB7 Duramax Powertrain Lb7 died. Pulled the codes off the truck below is the list. Save Share Reply Quote Like . Anyway i went through the whole process of key cycles so it can re learn the password. Save Share General Discussions 01-04. Im still getting the same thing even after clearing the codes. Save Share Checked codes again and only U1800 showed up. General Discussion. 0 Reply. Ron Nielson - Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different 2008 Silverado LT, Crew Cab, 2WD,LB a buddy has an 04 lb7. Checked the harness & plug for these 2 injectors had come loose. I have ground but am not getting power. 5 LB7 Duramax Powertrain A ton of "u" codes. AVS Forum Customer: I am having issues with a u1800 and p0090 code on my 2001 duramax with the lb7. Scanned and had u1800. We have a 2002 Sierra that we have replaced parts with and narrowed it down to the ecm having the issue internally. 5 (LBZ & LLY) Top Contributors this Month View All. Fix Ecm? Jump to Latest 384 views 2 2001 Silverado 3500 - has codes u1800 u2104 u2106, researched that most of time this combination of codes pops up, it is from the Can circuit, ficm or Tcm. 6 duramax (LB7) all stock (no mods) Google the code and "duramax", and the you-tube vid will show up in the results. AirLift LoadLifter 7500 XL Duramax P0380 Code. I replaced the glow plug controller and went ahead and put new glow plugs in and it cleared it. P. Truck is a California emissions truck. 03 Crew Cab Long Bed LB7 Duramax: merchant 04 LB7 with EFI live, straight pipe, intake horn, and air intake. I will Ohm the P0700 is the TCM requesting a MIL (Malfunction Indicator Light aka: "check engine"). Garrett cassell Discussion starter. 5 LB7 Duramax Powertrain 02 lb7 wont start. Tried clearing code several times, comes back right away. 32 posts · Joined 2012 Add to quote; Only show this user #1 · Oct 4, 2012. injectors? ironmike. mp06011999 226 Replies. Help, New Truck and P0700, U2104, U2105, and U2106 Codes . By chatting and providing personal info, you I need the flow charts for an 03 duramax with codes p0090 and u1800? 11. Pulled codes and got U1800 and can't remember but I think P1226 also. But after I cleared them and attempted to start it again they don’t come Code u1800. Found no fuses. Jump to Latest monitor doesn't want to recognize the vehicle and refuses to connect as well as my scanner. ^ The engine is running. It indicates that there is a problem with the Controller Area Network (CAN) serial data circuits. Good ole P0234 overboost. I was getting a P0101 code took it to the '05 Duramax - ECSB, T-bars cranked up, 2" blocks in the rear, Bilstein 5100 shocks, EFI Live by PPEI, Silverline 4'' stainless turbo back, Tint, 33x12. com Thread; P0700 Limp Code??? DuramaxDiesels. Truck randomly popped a P0651 code along with what I believe was a P237 code. I just had my first no-start issue. 5 LB7 Duramax Powertrain U1024 code and electrical issues. Please help, thank you. Jump to Latest 3. Loud Knock and Black Smoke. Have owned a repair 01-04. Plugged back in and she fires right up. If you pulled over and shifted from D to R, it sounded like the driveline was going to fall out. That one says refer to manual Thanks for any help you guys can give me . The troubleshooting flow chart says that if both of these codes come up together, to go straight to the ficm. 5 LB7 Duramax Powertrain 2003 Sierra 2500hd runs but only when primer is pumped This P1093 code on Duramax indicates that the engine is having a huge crisis in the motor compartment and is low on fuel. 1 2. The engine started after pumping the primer on the fuel filter housing. lb7 trouble codes. 8K views 1 reply Every search on the u1800 code comes up with the truck crank no start that I found. rwood64083 194 Replies. panel, no speedometer reading, no reading on the tranny temp gauge, and the brake light is on. 2) Trans fluid temp guage not working. Went into limp mode also. Googled the code to find out it mean lost communication with FICM. Any ideas?? General Discussions 01-04. Cleared codes, current DTC U1800. 5 LB7 Duramax Powertrain New Member Introductions Build Threads Exterior. rwood64083 307 Replies. Restarted the edge and it connected. I went to plug my CTS monitor in and when I did I got a big pop backfire along with white smoke and injector knock. Jump to Latest 4K views 13 replies Reason I bring that up is I now have a code u1800 which comes back to the ficm. All the instances of this on various diesel sites people find wires rubbed bare and grounded A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. 4. mp06011999 297 Replies. Introductions We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform. 6, 165k miles, 4" Exhaust Edge w/ Attidude Monitor Air Hog K & N air filter Never thrown a code but finally did it 3 times in 15 miles while towing my 39' toyhauler. I've intermittently had the ABS/Brake light on for the last few years along with the check engine light. ArdyC Discussion starter. 2L Diesel Engine Suspension & Steering - 2001 01-04. This means that the module is not able to exchange operating information and 01-04. pestman1 Discussion starter. I have a 06 lbz duramax. Save Share Reply Quote Like. What does the U1000 Duramax code mean? It means class 2 communication fault conditions. H. 6l v8 LB7 Duramax DieselInstagram: https://www. Jump to Latest to see a fuel leak than it is to see a vacuum leak anyways get a scanner and look at rail pressure if you can and any codes that shod narrow it down hope you figure it out Rescanned again and kept constantly getting u1800 and 2149. When started truck will try to take off in first, and even just idling away it'll bang out of first gear, then slam into 3rd (hydraulic default I assume) General Discussions 01-04. 50R17 Mickey Thompson MTZ mounted on MKW-27 17x9 wheels. 1) Gear indicator light on dash do not work. Its a communications code, usually a module failure or wiring issue. Its throwing codes p0374, p1261, u1800. G. S. 2L Diesel Engine Suspension & Steering - 2001 - 2010. 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004. 2003 Chevy 4500 6. No mods on truck and a little over 60k on the clock. Jump to Latest 15K views 13 replies 5 participants last post by Dmaxlineman Mar 16, 2013. 19 posts · Joined 2018 Add to quote; Only show this Got the engine in and cranking and i have a code p0370 any ideas guys? blk smoke lb7 <-----Lots of green $ Nov 8, 2010 5,694 0 36 57 belvidere,ill. Save Share 2002 Chevrolet Silverado K3500 LT 6. Pulling the codes once I got fresh batteries and bcm and that hooked back up. A few Duramax forums said it’s my FICM, any chance it could be the connection at the FICM rather Diagnostic challenges with a GM Duramax: Limp mode, fuel injectors, and the complexities of modern automotive technology explored in this story. Jump to Latest I'm not sure if you've done this yet, but when I bought my 02 Duramax, it had the 380 code. I have replaced 2 FICMs so far, and repaired dozens with the wires chafed at the alt bracket. This code is set when the engine control module cannot communicate wi 2003 Silverado w/ LB7 Let me start out with that the truck did have a Bullydog monitor which I've unhooked. let it run for a bit and everything seemed fine then all of a sudden died. 6L Duramax LB7 EFI Live V2, self-made custom tune 2005 2001 Chevy 2500HD LB7 Duramax 6. This morning I disconnected batteries. rwood64083 198 Replies. We could see if the pressure is dropping, or not climbing. I am also now showing code p0090 which comes back to a faulty fuel circuit from what I have read on here it could be the fpr I replaced that fpr and she will still just crank 04 LB7 crank no start with possibl u1800 code. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! From my googling I have not found anyone else with this problem it is completely intermittent between shutdowns new ecm new ficm new harnesses still act Im getting u1800 u2104 u2106 codes on my 02 chevy duramax its shifts at high rpms. Jump to Latest Pulled code and it is U1800. Duramax Diesel engine RPO codes include: LB7. 6 DURMAX CRANK NO START CODE U1800 Found ficm burn replace 175 amp fuse still no start - Cars & Trucks question. rwood64083 193 Replies. 7am my time (California) and I start my truck to go to work and runs normal, driving to work, pull up to a stop sign about 1/4 mile away from my work, engine light 01-04. code p0201, p0204, p0206, p0207??? Jump to Latest 33K views 7 i know the codes say injector circuit open, but what does that mean? also code p1261 come up it is manufacturer LB7 codes P1093 & P0087. Jump to Latest 2003 2500HD 6. All the 700 code does is tell the ECM "something's wrong" and to illuminate the MIL. Have owned a repair shop for 25 yrs. Chase What Causes P0540 Code on Duramax? There can be several reasons behind detecting p0540 in your vehicle with the Duramax engine. ChevyTech77 175 Replies. I thought maybe the baro pressure sensor was bad, so I replaced the one on the passenger side behind the fuel filter. ) I ran both continuity test and voltage drop test on the power and ground to the FICM, no problem identified. Jump to Latest 809 views 0 replies U1800. Ireplaced the MAF sensor last week with no luck. Browse Categories Answer Questions . com/eyvo_auto/Subscribe: I recently started getting a check engine light for code P0102 on my 02 LB7. 02ecsb lb7/zf6 284k Stock intake pro fab intake horn Stock exaust ppe boost valve P0102 code that I can't get rid off Efi live not on the truck yet . 2L Diesel Engine Duramax Third Generation: 2006-2007. 5K Also has two other codes a p1550c and a u1800 if I unplug ficm for decent amount of time when I through it back together codes are gone need some help this truck has been down for about a month and a half now . Got an SES light and checked with code reader. Jump to Latest I'm a dumba$$. 8350 posts Last code is “U1800”, out of attachment room. Truck got a p0193 code. I have a code u1800 for no communication between ecm and ficm. The other night the truck started ok and ran for a few seconds but then died and hasn't restarted since. mp06011999 237 Replies. I replaced the crank position sensor but still won't start! (LB7) Duramax Second Generation: 2004. 5 lb7 duramax powertrain. After a month of work with no luck I decided to try a new FICM but thought it was a little expensive to take the chance so I Tried again and the pass key lock blinked several times and the truck started. U1800? Ficm? Jump to Latest 4. 5 LB7 Duramax Powertrain 2001 duramax code p0370. * I have a U1800 code and zero rail pressure when cranking. Anyone had this before and what was the fix? checked fuses relays and all wires are has anyone had this code? i posted on here a while ago about my truck crank but no start its been down for 2 months now from what i can find the U1800 is a loss of Check the wiring harness and make sure it hasn't rubbed through first and that all the grounds on the engine/batteries are good and tight and clean. I've seen threads on chafes at the alt bracket, under the fuse box, and issues with the bail It is fixed!! 03 duramax crew cab LB7. 5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel LB7 DURAMAX PRIMING PROBLEM. Here is our guide to the 7 most common 6. ashton. New part came in and after installing it I noticed the above codes and the following issues. 2L Diesel Engine Suspension & Steering - 2001 - 2010 01-04. We looked for obvious things, chaffed wires, fuses 03 LB7 shift problem/codes keeps coming back. Hey Ernie Rutherford, 01-04. 6l LB7 Duramax Crew Cab DRW. 17 posts · Joined 2021 Add to quote Some codes that came up included u1800, p0090, p0193,p0380, p0540. 02 Ecsb zf6/lb7 284k Efi live by duramax tuner 5in exhaust into 6in miter cut stack Profab intake horn Stock air intake Glow shift gauges Code: U1800 Modules: Description: Lost Communications With Fuel Injector Control Module (FICM) (LB7) Duramax Second Generation: 2004. Truck now has 258,000 miles. 6L Duramax(TM) Diesel Engine (VIN 1 - RPO LB7) This bulletin is being issued to revise DTC P0201 - P0208 in the Engine Controls - 6. First off the truck was an 8. Air leak, low pressure supply line Fuel injector/s Scanner giving wrong codes I have been getting the U1024 code quite a bit in the last few weeks, which means Lost Comm with TCM. 6 duramax (LB7) all stock (no mods) There seem to be a good amount of treads with this code. New codes are C0550, P1550, C0201, U1800 and still seeing the U1000 also. com Thread; Again, this is a great place to start I have my project running now and it is throwing some codes, I am a little confused is the 0090 code the fuel rail pressure sensor or the control valve? Thanks. 2003 lb7 6. All stock The truck runs fine most of the day, then without warning the trans will start shifting at odd RPM's, power drops a bit and the check engine light may or may not illuminate. 5 LB7 Duramax Powertrain Need help diagnosing P0192 code. 1. Save Share 01-04. Potential causes and solutions behind this OBD-II standard trouble code popping up are discussed here. 5 LB7 Duramax Powertrain U1300 code stored. 2k views 0 u1800=tcm?? 02 lb7 ec/sb ls 4x4 tuff country leveling kit, bilistien 5100 shocks, hummer wheels wrapeed w/ cooper st maxx, optima red tops, sway bar end link, firestone ride rite air bags w/ firestone compresser, tie rod reinforcements, reinforcement tie rod ends General Discussion \ code po370 6. MeBucko. rwood64083 202 Replies. I'm getting: U2104 CAN Bus Reset Counter Overrun U2105 ECS Comm lost U1800 FICM comm loss '02 2500HD LB7 - Need your help/advice before I take 'er to the local Chevy dealer. Hass87 Discussion starter. Had a harness built by Ben Tyler at Bt Diesel works. Applications: 2001-Early 2004 01-04. Jojo needs a new ecm to regulate the few fpr. 6 duramax (LB7) all stock (no mods) Save Share Reply Quote Like. 6L Diesel V8 (RPO LB7 - VIN 1) Engine; and California Emissions (YF5/NE1), or Clean Fuel Emissions (VCL) Condition Some customers of 2002-04 model year Chevrolet Silverado; and GMC Sierra The cost of repairing a P0380 code on Duramax can vary depending on the severity of the problem. so far i have disconnected both batteries, checked fuses, looked for rubbed through wires, cleaned Just double checked for codes and found a U1800 from when it died on the freeway. Some of the most common reasons are discussed as follows: Faulty Heater Element. 2004 Silverado 4x4 2500 lb7 Efi live 5ps Fass lift pump (previous owner bypassed oem fuel pump New ficm New engine harness and ECM TCM harness Because we are in the secret itstheecmclubandyounotinvited club. From all out performance builds running 8 second ¼ mile territory, to 2000hp sled pullers and all the way back to the average guy looking Ron, you seem to be the guru on every forum I go to looking for this p0193 code. Ron Nielson 312 Replies. If you look these codes up, it is a comm failure between the ECM and the FICM. Jump to Latest 13K views 11 Can a code p0238 put the truck in limp mode only code pulling up and truck will not go pass 1900rpm Thanks for the help 01-04. . Did i short out my ficm or do i need to let it dry out more?? 2002 Chevrolet Silverado K3500 LT 6. They do. It shows this code stored. 2002 LB7 codes p0380 and p0540 Thread starter Plumbed1; Start date Jan 16, 2016; Forums. 6L sub-section of the Service Manual. Jump to Latest Runs great, idles great and then it just dies and gets harder to crank every time only code I have now is U1800 again . We strive to keep this the #1 forum for tech and 01-04. I pulled the radio fuse to download the tune. ChevyTech77 151 Replies. I trailered it home and checked all top engine harness connections along with codes and all I get is a u1800. ChevyTech77 169 Replies. 5. Jump to Latest 12K views When it threw the codes it sounded like a thunk, clunk in driveline. Put a scanner on it & got codes for injectors 6 & 8. Ran U1800 diag by SI 2000 and it lead to a FICM which did not change a thing (and I figured that would be the case. jump to latest 2. We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform. any help? I think it has something to do with my FICM from my preliminary searches and everything. ^ DTCs U1800, and U2104 are not set. VIN Digit: 1. EK_LB7 Discussion starter. 2L Diesel Engine Suspension & Steering LB7, EFI tuned, fass150. The engine is running. 6L LB7 Duramax problems and how to fix them. 5 2003 LB7 Duramax EFI live tune FASS Fuel pump US Gear Exhaust Brake Mag-Hytec Deep Transmission Pan Just a few common U**** codes u1000, u0105, u1016, u1041, u1800, u2104,u2105, u2106, 2020 GMC Sierra SLT 3500 CC/SB L5P 3/14/20 Payload 3726lbs. someone said it just needs to dry out, but its been down for over two months. Jump to Latest Clear the codes on my edge juice, restart it and it runs fine? FFWD to next morning. I fixed a pinched wire (all 3) that ran to the turbo boost sensor at the manifold where the intake horn was. Hello, I have a 2003 Duramax, 185k miles. Jump to Latest 6. doc fault code monitoring method sensed parameter acceptable operating range and rationality primary malfunction detection parameters secondary monitoring parameters and conditions monitoring time length The p0380 duramax trouble code indicates a problem within a heater circuit. I have probably spent 30 minutes cranking so I'm almost certain it's not a air issue (also I have a lift pump so I doubt) 2003 2500HD 6. Top 2001 6. DTC U1800, U2104, or U2106 will set, depending on what communication is lost. 2L Diesel Engine Suspension & Steering - 2001 Subject:07057 -- SPECIAL COVERAGE ADJUSTMENT - ENGINE GLOW PLUGModels:2002-04 Chevrolet Silverado 2002-04 GMC Sierra Equipped with 6. Truck is the one Does it come back if you clear it? Check the two large engine bale connectors on the drivers side for pushed back or bent/loose pins. Had it towed to the dealership and they diagnosed it as a faulty PCM and replaced it. Top Contributors this Month View All. got the following Been sitting since last Sep/Oct with crank/no start. 5 LB7 Duramax Powertrain New Member Introductions Build Need help asap to resolve this issue. gmc502 67 Replies. Ron Nielson 232 Replies. mp06011999 242 Replies P0875 and P0700 Codes in 02' LB7 Transmission. Jump to Latest 16K views My 01 LB7 had the same code after changing the fuel filter, tried everything to fix it per recommendations on the forum. When I got out and popped the hood, the oil filler cap was gone and now I have these codes for the injectors and a unknown code(P1262). Trany is hard shifting PLEASE HELP. Jump to Latest 6K Then on my way home the cel light came on and I looked through my cts2 and it has a bunch of communication codes, p0700, u1000, u1800, u2104,u2106, u2105. Jump to Latest 17K views 13 Hi guys after a bit of help diagnosing my truck, getting a u1800 code that I can't get to bottom of. Big thanks to him. Took out an aftermarket (relay style) auto starter and cobbled in aftermarket radio. Jump to Latest Got codes pulled (p0380, u1800, u2104, u2106, u1301, u1000, u1016) have been looking through all the wiring and fuses. So maybe I was chasing my tail with fuel issues when I may have an injection component problem. There is another code in the TCM that you need to pulled the code off my edge insight, gave me code u1800. From all out performance builds running 8 second ¼ mile I recently got the check engine light, and went to Auto Zone to get the code. 5 LB7 Duramax Powertrain. Purposely bought one with "newer" injectors. Loaded a tune onto truck, truck ran fine. On the other hand, the entire glow plug control module can The most common cause of the p0093 code I've seen is the CP3 getting weak. 6 diesel chevy duramax. Your truck may have a Z71 sticker on the side of the bed indicating an off-road package; that is an example of an RPO code. There is another code in the TCM that you need to pull that will actually tell you what the malfunction is so let me know what that code is and I will help you out. Jump to Latest Now the mechanic says that i have a single code U1800C and that none of his subscription services can tell him anything about this code. 5 LB7 Duramax Powertrain truck throwing codes. 5 LB7 Duramax Powertrain 01-04. I did a search here in the forums, and found out that it means Loss Of Communications with Fuel Injector Control Module (FICM). It had to have the pedal at 50% before it was start to rev. truck starts and goes fine when plugged in over night. mp06011999 220 Replies. 6 diesel chevy duramax code po370 6. Members Online • Mr2Drinks. Wasn't my problem but mine is a 2002. 6 LB7 Diesel Engine G104, G105 - Left Battery Ground G102 - Right Battery Ground 2003 2500HD LS CC/LB 4x4 Duramax/Allison Completely Stock 01-04. 7K views 6 checked fuses and everything, finally it threw a u1800 code. read this article for more information. 5 years ago from a Chevrolet dealer, and as far as I know it is stock, with the exception of a cold air intake. Some I cannot read. 02 lb7 completely stock except for small lift pump and 3" exhaust. 5 LB7 Duramax Powertrain U1000 code? Jump to Latest Does anyone know what this code is? I cleared the code but it came back. 57diesel 125 01-04. Have it all back together is one code U1800 now my ficm is plugged in and I've looked at wiring right by alternator and all looked good but I'm wondering how do I test to see if the ficm just crapped out on me LB7 Code U1800 FCIM wire chafe General Discussions 01-04. LB7 Crank No start. I would check the wiring over again just to be sure, not just at the alt area. 7K views 4 replies I recently got the check engine light, and went to Auto Zone to get the code. Jump to Latest 16K is the truck cranking at all? and the code if you didnt know it means (P0374 Timing Ref Hi U1800 I cleared the codes & still no start. It's the only code I'm getting also and reran all power and ground wires with the batteries. Aaron@LDS. And the truck seemed to go into a wierd shift pattern. Duramax First Generation: 2001-2004 (LB7) Loss of communications with ecm,pcm, ficm etc. Bought a 2002 duramax two years ago. I don't think I had the P0700, and my tranny hasn't shifted weird and haven't got the CEL. Jump to Latest 42K views The duramax I bought had a couple U codes in it, like lost communication with TCM and BCM or something. i thought it was the fpr so i replaced it but the codes and defueling came back. The cruise control still worked, it rolled through all the Customer: i have a crank no start with code U1800 LB7 Duramax injector harness Mechanic's Assistant: Have you checked the engine's fuel supply? Are the spark plugs, fuel pump, and ignition all working? Customer: its a diesel there r no spark plugs Mechanic's Assistant: What's the year and model of your GM? Customer: 2001 chevy 3500 diesel Mechanic's Assistant: OK. Here is a link of it crankingCranking LB7 . Here are the six most common issues with the 6. 57diesel 141 Replies. You can use your scanner to log rail pressure while causing the truck to set the code. Transmission P0700, U2106 four week battle - Fixed . After reseting the codes the 3rd time they never came back on again. t. If your truck cranks, but does not start, and continues to throws the DTC U1800, the fault could be in The fault code U1800 makes sense nowThe code means unable to communicate with the ficm which a majority of the time is caused from a short!! (LB7) Duramax Second Generation: 2004. Ron Nielson 220 Replies. mp06011999 284 Where can you learn more about P0700 codes in your Duramax? Code P0700, DuramaxForum. 5-2005 (LLY) 6. 6 Duramax U1800 code ficm not responding Crank no start. 5 (LBZ & LLY) Top Contributors this Month 03 lb7 getting p0089 fuel pressure regulator 1 performance code and p0088 fuel rail/ system pressure too high code. Jump to Latest 9. I'm not sure if the codes are related, but I'm getting a C0550 and P0103 codes. I have the duramax LB7, it is building fuel in the oil and the engine is clacking. I will verify, but a NOM TCM will likely cost around $1k. Yes I am getting the four injector codes. 2004 Silverado Cali lb7, Airdog ll 165, fresh sticks at 325k, Rick Fletes Dsp 5 on v2, 33x12. I have ground but am not getting power and if I disconnect the ecm it still gets a very mild ground sent from the FICM Mechanic's Assistant: How long have you been experiencing power issues? Does the power come back on eventually? U1800 Code - Lost Communications With Fuel Injector Control Module General Discussions 01-04. truck sputters and dies while driving. 01-04. After several trips to the dealer and this past week in the shop the problem is fixed. U1800 Chevrolet Diagnostic Trouble Code (DTC) Definition, Causes and Diagnosis. pulled codes and got p0201-04-06-07 and a u1800 code pulled my edge off and didn't have any problems from then on. 687 posts · Joined 2016 Add to quote; Only show this user #2 2003 2500HD 6. 2003 Silverado 2500HD LT 4x4, 6. 1K views The U1800 code is set when no comm between ECU and FICM. 18 posts 01-04. Cleared the code with my banks IQ,code came back. 84 posts · Joined 2011 Add to quote Code: U1800 Modules: Description: Lost Communications With Fuel Injector Control Module (FICM) Is that the DTC you getting? 2001-2004 (LB7) Duramax Second Generation: 2004. 5 LB7 Duramax Powertrain P0380+p0540. Failure to communicate with fuel injector control module. Code U1800. Now I’m getting codes P0651 and P2228 (Baro sensor). Welcome to Duramax Diesels. Duramaxdiesels. Jump to Latest 19K views 5 Have you checked for other codes since it won't start? You should check the fuses also. Has anybody had this problem or 01-04. only codes are pcm u1800 and pcm 0090 We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform. AVS Forum I now get a code P0540 which is the Intake air heater circuit, and a code U1800 which is CAN bus communication. more than twice. I replaced the fp sensor, fpr, fuel filters, new batteries (truck was due for them) I shot wiring on the fuel pressure sensor. 34 posts · Joined 2018 Add to quote; Only show this user My truck is a 2004 silverado 3500 with the LB7 engine in it. 57diesel 135 Replies. I would check the P0700 is the TCM requesting a MIL (Malfunction Indicator Light aka: "check engine"). Jump to Latest 27K views 16 replies Stats on the truck. 5 (LBZ & LLY) Top Contributors this Month 2003 LB7 Duramax FASS lift pump. AMEDEE. com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. I can prime it and shoot some starting fluid, but still no fire. 02 K2500 HD 4DR SB You have a LB7? Google "Duramax P0201, P0204, P0206, P0207, P1261" lots to read DTCs U1800, and U2104 are not set. 2011 3500HD 4x4 - EFI Live by Kory Willis, 4" exhaust, EGR blocked, Insight CTS2, AirDog 01-04. The U1800 code is set when no comm between ECU and FICM. Going to get the batteries tested 01-04. About 9 months ago, I noticed that my CEL came on (code P0711 transmission fluid temp sensor A circuit range/performance) and the transmission temperature gauge stopped If so then do ohm test on the injectors from the 20? codes to see if one is open, shorted to ground, or shorted injector. Ron Nielson 211 Replies. I have a 04 lb7 California emissions truck myself with the same u1800 code. Took apart and blew out all wire connectors I can see. 2001-2004 (LB7) Duramax Second Generation: 2004. Should i be worried and how do i get rid 01-04. It's 4wd. until last night was leaving the in laws and started my truck let it run loaded all my stuff 01-04. 3K views Scanned it using Torque Pro App. 5 LB7 Duramax Powertrain FICM Problems need help!! . My 2500HD of 118K miles starting throwing network codes this week. i was able to pull a U1024 code before my edge stopped communicating. 1ST Generation Duramax [LB7] Electrical U1800 code. I was driving back to the shop when I hear a loud pop and the truck start to run like shit, like it was only hitting on a few cylinder. 6L LB7 Duramax’s most common problems. Jump to Latest I have a U1300 code stored in my OBDII my CEL light isn't hen i hook my OBDII reader up. 2003 LB7 2500HD 6 speed manual -Sold- 2010 Camaro SS EFI live, Magnaflow exhaust -sold- (LB7) Duramax Second Generation: 2004. thats all i've done to the truck for now. Ron Nielson 236 Replies. I looked under the hood, and two yellow wires were chewed through on the top delphi connector on the driver's side of the engine compartment. Displayed trouble code p1626. 5 (LBZ & LLY) Top Contributors this Month McCrown, did you ever find out what was the problem. P0090- fuel pressure high P0193- fuel pressure sensor high voltage P0540- air intake heater P1626- unknown U1800- unknown U1026-unknown U1152-unknown U1041 Getting the u1800 code on my lb7, put in a new ficm, ran for a day now it won't start. DTCs U1800 and P2149. doc 2001file9. It cannot hold pressure when under harder acceleration or at higher speeds under load, or passing, or towing uphill. Mechanic's Assistant chat. DTC U1800? and other codes. Jump to Latest General Discussions 01-04. Go to Duramax r/Duramax. M. P0335 code, No Start. 30 years ASE Master L1 GM certified. Ron Nielson 226 Replies. 5 LB7 Duramax Powertrain LB7 No Start. General Discussions 01-04. The code came back as U1800. May 13, 2012 Duramaxdiesels. Anyone had this before and what was the fix? checked fuses relays and I replaced the fuel filter housing as well and it primes up good and hard. He says that he did check continuity on all the CAN circuits and found nothing there. On my 2003 lb7 . Cars & Trucks 2003 GMC duramax 3500 has codes p0370 u1800 p0489 p0404 p0089 p0101 wont start. Wisconsin certified emissions state inspector I need the flow charts for an 03 duramax with codes p0090 and u1800? Tim's Auto Repair. ASE certified tech ADVANCED LEVEL SPECIALIST. truck was dufueling and throwing these codes. Those were the last things done to the truck to my knowledge beside new xfer case. Customer: 2003 Chevy 4500 6. Top Contributors this Inconsistent Rough Idle, No Codes. (LB7) Duramax Second Generation: 2004. You can expect each plug to cost between $70 and $150. Straight pipe. 6. 5 (LBZ 01-04. instagram. after clearing the codes they apperaed back when racing the engine. 2003 2500HD 6. 6 lb7! cranks no start! replaced starter, has 2 new batteries, replaced fuel filter and housing, oil changed, crank shaft sensor, key relearned, using autel scanner it shows desired / Now I scanned for codes and I get U1800 and P0090 then I erase the codes and scanned again and it came up with U1800 and P0090 again. The code specifically refers to a loss of communication with the Fuel Injector Control Module. 2020. LB7 & U1800 no start after replacing the injectors. 5 LB7 Duramax Powertrain Lb7 p1093 & u1800. Each revision of the Duramax is assigned a new 3-digit RPO code, which is GM’s internal designation for a particular option. U1800 code when stuttering. I will start with cleaning the MAF sensor. The only code I'm getting is a p0090 something with the fuel pressure regulator. Attachments. Jump to Latest getting the same u1800 code, any suggestions? Thanks in advance . Jump to Latest I did find a previous U1800 and U0100 code that worries me though. My scanner gave me these stored codes U1800, P0090, P0089, and P0404. eroxh celoon mbrays opjiw zrvd xaavog ksc xrke ndltkb jve