Lb7 duramax code u1800 mp06011999 283 Replies. Chris (aka-Moose) 24 years of experience diagnosing & repairing. mp06011999 263 Replies. Ron Nielson 247 Replies. I found a p1000 code but not u1000 dtc. 687 posts · Joined 2016 Add to quote; Only show this user #2 2003 2500HD 6. Jump to Latest General Discussions 01-04. 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. Also when I plug my autocal into the obd2 it’s not coming on. Jump to Latest 3. Here is what has been done: Replaced collapsing rubber fuel lines. I have ground but am not getting Duramax P0380 Code. no work done on truck other than oil change 1 month ago. P1261, which just means a circuit problem with injectors 1,4,6, ^ DTCs U1800, and U2104 are not set. LB7 Duramaxdiesels. Top Contributors 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. 19 posts · Joined 2018 Add to quote; Only show this user #5 01-04. 5 (LBZ & LLY) Top Contributors this Month View All. Jump to Latest 12K When it threw the codes it sounded like a thunk, clunk in driveline. Come join the discussion about modifications, towing, classifieds, 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. Has the computer or FICM failed? Background: code PO 0090 had tripped and Truck would not start until code was cleared. 30 years ASE Master L1 GM certified. ChevyTech77 190 Replies. 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. 2003 Chevy 4500 6. Jump to Latest 13K I'm not sure if you've done this yet, but when I bought my 02 Duramax, it had the 380 code. Save Share Reply Quote Like. 5 (LBZ & LLY) 01-04. let it run for a bit and everything seemed fine then all of a sudden died. No start Duramax code P0370. Jump 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 Rescanned again and kept constantly getting u1800 and 2149. A. Jump to Latest Engine still turns over but wont start and U1800 code came up again. I just had my first no-start issue. Jump to Latest 7K views 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. cgfitch 104 Replies. Jump to Latest 27K views 16 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. 6 duramax (LB7) all stock (no mods) Save Share Reply Quote Like. 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 . It wouldn't start. was wondering if anyone knew what the codes ment? U2104, U2105, PO700, U1800, U2106, 4" straight exhaust, I am having issues with a u1800 and p0090 code on my 2001 duramax with the lb7. I would check the Inspecting the harness usually caused the fault to disappear (for a while), before it reared it's head and killed the truck instantly. AirLift LoadLifter 7500 XL 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. 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). Introductions . ChevyTech77 192 Replies. I had a issue with my 2002 doing that and A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Tim&#039;s Auto Repair. Due to several harnesses having been disconnected from the engine, I ignored the U1800 DTC for the moment. ArdyC Discussion starter. 5-2005 (LLY) 6. They do. U1800 Chevrolet Diagnostic Trouble Code (DTC) Definition, Causes and Diagnosis. pulled the code off my edge insight, gave me code u1800. 2003 Silverado w/ LB7 Let me start out with that the truck did have a Bullydog monitor which I've unhooked. Jump to Latest 1. U1800- unknown U1026-unknown U1152-unknown U1041-unknown U1064-unknown U1024-unknown I cleared them and the U codes came back I'm assuming they are abs related with the module being removed. If you look these codes up, it is a comm failure between the ECM and the FICM. Ron Nielson 220 Replies. 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. CEL does not illuminate for these codes. LB7 & U1800 no start after replacing the injectors. And the truck seemed to go into a wierd shift pattern. Did i short out my ficm or do i need to let it dry out more?? 2002 Chevrolet Silverado K3500 LT 6. 4K I did find a previous U1800 and U0100 code that worries me though. . Anyone had this before and what was the fix? checked fuses relays and all wires are good. Recommended Communities. Please consider 01-04. Code u1800. Found no fuses. Im getting u1800 u2104 u2106 codes on my 02 chevy duramax its shifts at high rpms. 57diesel 94 Replies. That was a little confusing, but P2149 proved to be the more problematic of the two codes. mp06011999 264 Replies. 0 Reply. DTC U1800, U2104, or U2106 will set, depending on what communication is lost. Then after scratching my head for a few minutes, I went to start it back up. Chevy / GMC Duramax 01-04. 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. It had to have the pedal at 50% before it was start to rev. Question: Jump to Latest 521 I am really wondering if this is causing the p0090 and u1800 codes to come active. The code specifically refers to a loss of communication with the Fuel Injector Control Module. 5 (LBZ & LLY) Top Contributors this Month 01-04. I 01-04. Ron Nielson 265 Replies. a buddy has an 04 lb7. From what I remember, 01-04. 5 LB7 Duramax Powertrain 2001 duramax code p0370. Full Forum Listing. I have a code u1800 for no communication between ecm and ficm. I have a 2004 lb7 it has 163000 miles this is a problem I had about 6 months ago that I thought I had fixed by removing my edge juice. Mechanic's Assistant chat. 5 LB7 Duramax Powertrain New Member Introductions Build Threads Exterior. rwood64083 172 Replies. 4. I recently got the check engine light, and went to Auto Zone to get the code. Jump to Latest monitor doesn't want to recognize the vehicle and refuses to connect as well as my scanner. 6. 5 LB7 Duramax Powertrain. We looked for obvious things, chaffed wires U1800 Code - Lost Communications With Fuel Injector Control Module General Discussions 01-04. Please help! possible FICM failure. Getting a p0090 and u1800. M. 2003 LB7 Duramax FASS lift pump. injectors? ironmike. 1) Gear indicator light on dash do not work. My 2500HD of 118K miles starting throwing network codes this week. Idle vaccum reads 4" WOT vaccum reads 8-9" Checked wiring to Chevy / GMC Duramax 01-04. If your just getting P1261 by it's self Google "Duramax LB7 P1261" lots to read. Checked codes again and only U1800 showed up. No Start? Code - P0374. I replaced the glow plug controller and went ahead and put new glow plugs in and it cleared it. Dec 9, 2016 #1 Bought a 2002 duramax two years ago. 6 duramax (LB7) all stock (no mods) 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 Just double checked for codes and found a U1800 from when it died on the freeway. any help? I think it has something to do with my FICM from my preliminary searches and everything. only codes are pcm u1800 and pcm 0090 from reading through other posts of similar issues it sounds like injectors, Duramaxdiesels. ADMIN MOD Fuel Injector Control Module bad? I have a 2003 LB7 Duramax. I General Discussions 01-04. Still trying to figure out what that green wire is on that connector that is broken. Jump to Pulled code and it is U1800. 2003 2500HD 6. AVS Forum Go to Duramax r/Duramax. Please help, thank you. com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. Top Contributors this Month 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. Have owned a repair 01-04. 5 LB7 Duramax Powertrain U1024 code and electrical issues. 669 posts · Joined 2011 I’m working on a 2005 LLY and it is throwing code p0193 and will not start I can unplug the fuel rail pressure sensor and jump the 5v ref and the signal wire together with a paper clip and then the code General Discussions 01-04. I've seen threads on chafes at the alt bracket, under the fuse box, and issues with the bail Pulled code and it is U1800. someone said it just needs to dry out, but its been down for over two months. LB7, EFI tuned, fass150. Will not start. Maybe broken or bare wire? Save Share I Have an 03 Reg Cab 2500HD Duramax/Allison 4x4 all stock, throwing codes P0090 Fuel Pressure Regulator and U1800 No communication with FICM. Pulled codes and got U1800 and can't remember but I think P1226 also. Ron Nielson 312 Replies. ^ The engine is running. DTC P2149 01-04. mp06011999 260 Replies. 5 LB7 Duramax Powertrain U1000 code? Jump to Latest Does anyone know what this code is? I cleared the code but it came back. Replacing just the glow plug relay may cost as little as $50. All U2104 CAN Bus Reset Counter Overrun U2105 ECS Comm lost U1800 FICM comm loss U1152 HVAC Comm loss U2106 TCS comm loss I've reseated all appropriate fuses and cables. It cranked My scanner gave me these stored codes U1800, P0090, P0089, and P0404. mp06011999 297 Replies. com was founded in 2006 and created a site which houses some of I recently got the check engine light, and went to Auto Zone to get the code. ChevyTech77 151 Replies. Jump to Latest 6. Also check the harness and 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!! The fault code U1800 makes sense now (LB7) Duramax Second Generation: 2004. Truck is the one The U1800 code is set when no comm between ECU and FICM. 03 duramax no start. 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 01-04. 04 LB7 crank no start with possibl u1800 code. 6 Technical. 5 LB7 Duramax Powertrain A ton of "u" codes. ) I ran both continuity test and voltage drop test on the power and ground to the FICM, no problem identified. General Discussions 01-04. akhenaton22 New member. 5 LB7 Duramax Powertrain New Member Introductions Build 01-04. Members Online • Mr2Drinks. U1800. The cost of repairing a P0380 code on Duramax can vary depending on the severity of the problem. 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. After several trips to the dealer and this past week in the shop the problem is fixed. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! 03 LB7 shift problem/codes keeps coming back. U1800 code when stuttering. t. glenlloyd 82 Replies. May Duramaxdiesels. Wasn't my problem but mine is a 2002. The code came back as U1800. 2L Diesel Engine Suspension & Steering - 2001 - 2010. The motor, which was running, started really running rough and missing so I shut it off. 5. Anyone had this before and what was the fix? checked fuses relays and all wires are 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. 6 duramax (LB7) all stock (no mods) Google the code and "duramax", and the you-tube vid will show up in the results. after clearing the codes they apperaed back when racing the engine. 2020. This is an older thread, you may not receive a response, and could be reviving an old thread. 5 LB7 Performance Parts Discussion. I just put on efi live and an edge monitor yesterday . 5 LB7 Duramax Powertrain New Member Have a 04 LLY Duramax that I cannot get too start up. P. However, if you have to replace the glow plugs, the price will go up. 5 LB7 Duramax Powertrain truck throwing codes. I got one of those scanners and it came up with 2 codes1st: P0370 and the second : U1800for the first code it means timing reference resolution signal A malfunction Duramaxdiesels. MeBucko. Dec 8, 2016 7 0 0. I am thinking I fried the FICM but wonder why it took so long for the truck to die after power washing. 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. Ran my dashcommand app after driving it home, got the following codes: P0700 U1800 U2104 U2105 U2106 01-04. Transmission P0700, U2106 four week battle - Fixed. Pulling the codes once I got fresh batteries and bcm and that hooked back up. By chatting and providing personal info, you I need the flow charts for an 03 duramax with codes p0090 and u1800? 11. Browse Categories 2003 GMC duramax 3500 has codes p0370 u1800 p0489 01-04. Some codes that came up included u1800, p0090, p0193,p0380, p0540. Answered by Chris (aka-Moose) in 17 mins 3 years ago. P1093 P1094 And last night for the first time a U1800 code that hasn't come back yet. Jump 2nd is U1800 no info on that. Jump to Latest (LB7) Duramax Second Generation: 2004. That said, the enabling criteria for P2149 indicated that P2149 would not run in the presence of U1800. r/Duramax. If you pulled over and shifted from D to R, it sounded like the driveline was going to fall out. New codes are C0550, P1550, C0201, U1800 and still seeing the U1000 also. Changed fuel filter Checked injector balance rates. Pulled the codes and the codes are; P0700 U2105 U2106 U1800 6. Duramax 6. 5 LB7 Duramax Powertrain Lb7 died. The truck just randomly died on me at a stop light and would not start back up towed it back to my shop and truck fired right back up. glenlloyd 131 Replies. Failure to communicate with fuel injector control module. Save Share Duramax First Generation: 2001-2004 (LB7) Help!! No Start U1800/P0090. Here is some reading material for you: P0090 - Chevrolet Diagnostic Trouble Code (DTC) Definition A forum community dedicated to Chevy and GMC Duramax diesel owners and , maintenance, and more! Show Less . 5 LB7 Duramax Powertrain LB7 No Start. 7K views 4 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. truck sputters and dies while driving. 2003 A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. pulled codes and got p0201-04 Stats on the truck. (LB7) Duramax Second Generation: 2004. Power door locks are now working as well as the key fob and all gauges are working again. Save Share 2002 Chevrolet Silverado K3500 LT 6. Jump to Latest 3K views After scaing the truck the following codes were there: p0700,U1800, U2104, U2105, U2106. Codes will not clear/erase. I have replaced 2 FICMs so far, and repaired dozens with the wires chafed at the alt bracket. Welcome to Duramax Diesels. Is my FICM toast? Thanks!!! Hi guys after a bit of help diagnosing my truck, getting a u1800 code that I can't get to bottom of. Jump to Latest 809 views 0 2002 LB7 codes p0380 and p0540 Thread starter Plumbed1; Start date Jan 16, 2016; Forums. I have ground but am not getting power. rwood64083 194 Replies. 6l LB7 Duramax Crew Cab DRW. 4K views Ran fine for 30 seconds and died got u1800 code. DTC U1800? and other codes. rwood64083 307 Replies. From there I checked the bale connectors on the LH valve cover, the FICM, TCM & ECM connectors - all 2001-2004 (LB7) Duramax Second Generation: 2004. No mods on truck and a little over 60k on the clock. 8K views 1 Every search on the u1800 code comes up with the truck crank no start that I found. 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). 2) 6. It indicates that there is a problem with the Controller Area Network (CAN) serial data circuits. Those were the last things done to the truck to my knowledge beside new xfer case. 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. I can prime it and shoot some starting fluid, but still no fire. LB7 . * I have a U1800 code and zero rail pressure when cranking. 5 LB7 Forums. U1800 after coolant hose burst. Explore Our Forums. LB7: code u1800 lost commuication with ficm Thread starter bigbopper; Start date Dec 4, 2015; Forums. 2003 lb7 6. 5 LB7 Duramax Powertrain 2003 Sierra 2500hd runs This P1093 code on Duramax indicates that the engine is having a huge crisis in the motor compartment and is low on fuel. Save Share General Discussions 01-04. May 13, 2012 Duramaxdiesels. Checked vacuum at idle, and under WOT. 3K 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. Its throwing codes p0374, p1261, u1800. Code PO 0090 would not clear after multiple attempts to clear and U1800 appeared on scanner. Plumbed1 New member. com was founded in 2006 and created a site which houses some of 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. Search Fixya. 1K views The U1800 code is set when no comm between ECU and FICM. Getting the u1800 code on my lb7, put in a new ficm, ran for a day now it won't start By chatting and providing personal info, you I have the duramax LB7, it is building fuel in the oil and the engine is clacking. By chatting and providing personal info, you Customer: I am having issues with a u1800 and p0090 code on my 2001 duramax with the lb7. Duramaxdiesels. ashton. The truck runs great. 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004. I replaced the fuel filter housing as well and it primes up good and hard. 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. so far i have disconnected both batteries, Duramax First Generation: 2001-2004 (LB7) Active P0090, inactive U1800, injector stuck open. Purposely bought one with "newer" injectors. Preliminary check on the wiring and fuses revealed nothing, but I don't have power on pin 118 Injector It is fixed!! 03 duramax crew cab LB7. 5 LB7 Duramax Powertrain P0380+p0540. 5 LB7 Duramax Powertrain 03 dmax won't start. You can expect each plug 01-04. 5 LB7 Duramax Powertrain U1800 Code after power washing. 01-04. Sort by Oldest first Oldest first Newest first Most reactions. Truck now has 258,000 miles. Trany is hard shifting PLEASE HELP. Has anybody had this problem or If you're getting a p0090 code, that's for the control circuit for the fuel pressure regulator. 2L Diesel Engine Duramax Third Generation: 2006-2007. Loud Knock and Black Smoke. read this article for more information. 5 LB7 Duramax Powertrain Lb7 p1093 & u1800. So maybe I was chasing my tail with fuel issues when I may have an injection component problem. 6 DURMAX CRANK NO START CODE U1800 Found ficm burn replace 175 amp fuse still no start - Cars & Trucks question. 2500. If your truck cranks, but does not start, The U1800 code is a Loss of Communication Diagnostic Trouble Code (DTC). Jump to Latest 4K views 13 Reason I bring that up is I now have a code u1800 which comes back to the ficm. 1ST Generation Duramax [LB7] Electrical U1800 code. i was able to pull a U1024 code before my edge stopped communicating. Jump to Latest 9. ^ The charging system voltage is between 6 It sure helps when you post all your codes. Took out an aftermarket (relay style) auto starter and cobbled in aftermarket radio. mp06011999 284 Replies U1800 I cleared the codes & still no start. 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. Duramax Hard Parts. 57diesel 125 Replies. Customer: 2003 Chevy 4500 6. Jump to Latest 16K views 4 is the truck cranking at all? and the code if you didnt know it means New part came in and after installing it I noticed the above codes and the following issues. 57diesel 100 Replies. mp06011999 237 Replies. Top Contributors this Code: U1800 Modules: Description: Lost Communications With Fuel Injector Control Module (FICM) (LB7) Duramax Second Generation: 2004. LB7 Crank No start. Jump my 2001 LB7 is throwing codes. The only code I'm getting is a p0090 something with the fuel pressure regulator. R. 2L Diesel Engine Gives me a P0370 code. 6 Duramax U1800 code ficm not responding Crank no start. Top Contributors this Month View All. Been sitting since last Sep/Oct with crank/no start. glenlloyd 88 Replies. Help, New Truck and P0700, U2104, U2105, and U2106 Codes. 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. pysljad fefhng gwjfha wletdozw btprbh eyi flhoj xjtscm ryio ijux