U1800 code duramax

8. Since you're apparently not currently getting a U1800, I wonder if that "old" code was just the result of tinkering. The only time I ever got a U1800 was when I had water intrusion into my FICM because the rubber plug on top of the FICM had dry-rotted and fallen out.

Codes U1000 U1016 and U1096, any ideas? Jump to Latest Follow ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 209.5K members Since 2005 A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more!Just purchased this C550 with a duramax disel and I have multiple codes on the scanner showing. Control Module Codes $7E8, $7EE, $7EA / P160c, P2510 ECM POWER RELAY, GLOW PLUG CIR P0671, PO672, ... I am getting a U1800 code (Lost comm w/ fuel injector module) ...Hmm try googleing duramax u1000 code. 2004.5 GMC Sierra 2500HD LLY excab long bed 2wd. Save Share. Like. ... A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more!The codes are po202, po203, po205, po208, and p1262. They are always recorded twice, so 10 codes, but these are just repeated. ... •DTC U1800, or U2104 are not set. ... A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the discussion about modifications, towing, classifieds, troubleshooting ...P0300. Cylinder Misfire Detected Random Cylinders. Ignition coils. P0449. Evaporative emission (EVAP) system, vent valve circuit malfunction. P1000 - P1099 (Fuel and air metering and auxiliary emission control) P1093. Fuel rail pressure (FRP) sensor, command/actual fuel pressure -signal variation. Wiring, poor connections, FRP sensor.

6.5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004.5-2005 (LLY) 6.2L Diesel Engine Fuel System, Air, Exhaust & Emissions Upgrades Top Contributors this Month View All2007 LBZ P0087 code HELP!!!! All help appreciated!!! So I bought a 2007 2500HD CC long bed 2WD with 87K 2yrs ago. Every time I pull more than 3k, I get P0087. Here's what I've done to try and fix FASS fuel system, new lines from tank to engine, fuel filter, DPE relief valve, Bosch Fuel rail pressure sensor, injectors, tested CP3 ( I can command ...4,880 satisfied customers. 2001 Chevy 2500HD 6.6 Duramax 4x4 Lots of codes. P0087 P0093. 2001 Chevy 2500HD 6.6 Duramax 4x4 Lots of codes. P0087 P0093 P0102 P0107 P0540 U1000 U1800.Keep in mind, all of these changes did not rid the truck of the sputtering issue, or really improve it: THERE ARE NO CODES AT ALL. -replaced fuel filter. -rebuilt filter head. -replaced all rubber lines from ficm to cp3. - Removed fuel tank pickup, sprayed clean and blew through it to check for clogs.U1000 U1041 U1096 codes. Ever since my girl rolled over 200k shes been a bit fussy. I got in today and started her up and the battery light was on. The PRND321 was not lit up, the temp gauge does not work, the push button 4wd does not work and has no light on, no blower for air, and the dial that changes the air position does not work.205 posts · Joined 2012. #4 · Feb 25, 2014. Ive had the tuning for maybe about a month. Today when I started the truck, all the service traction control and other things were gone, the check engine light was still on, throwing a U0101 code and now also a P0880 code. There is now a line under the gear selector and I am also able to drive it now.Are you looking to enhance your coding skills? Whether you’re a beginner or a seasoned programmer, there are plenty of free coding websites that can help you level up your skills. ...

Cadillac CTS: Some Cadillac CTS models have experienced U1041 codes due to problems with the electronic brake control module (EBCM). GMC Sierra: Similar to the CTS, the GMC Sierra has also had instances of codes related to the ABS module or wiring issues. Hummer H2: The Hummer H2 has been known to experience this code due to faulty wheel speed ...0. Sep 3, 2018. #1. 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. Has anybody had this problem or any suggestions?The computer uses engine oil pressure to cycle the vanes from 0-100%. This pressure pushes a plunger, which moves the unison ring and, in turn, cycles the vanes through their whole range from closed to open. In a P003A code, the problem lies with the unison ring: it seizes up and can no longer turn its full motion.Jun 7, 2020 · To diagnose the U1800 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.P0621,P0622,P0700,P1643,U1000,U1024,U1800,U2106 Also has idle surge, fuel pressure is varying. FPR is probably sticking I had no CEL. They were unable to get the truck to actually throw any codes when they had it. From what I found online, it looked like possibly the bail connectors to the FICM. I don't have anything I can pull rail pressure from.

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Water Pump Failure. Fuel Filter Housing O-ring Leaks. Blown Head Gasket. Overheating (fan clutch problems, radiator gunk) In addition to the above common engine problems, there are also a few worthwhile to mention problems that affect high horsepower LB7's: Crankshafts + connecting rods break at high hp.The fault code U1800 makes sense now...The code means unable to communicate with the ficm which a majority of the time is caused from a short!! This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.P0113 code LLY duramax. Just a FYI post incase anyone ever runs across this code. I replaced my #1 injector yesterday. It died had a balance rate of 15+. But that wasn't the code. It didn't show any codes actually but truck was way out of balance and you could feel it bad. But anyways replaced the injector threw it all back together real quick.Ron, you seem to be the guru on every forum I go to looking for this p0193 code. I have a 06 lbz duramax. Loaded a tune onto truck, truck ran fine. Pinned the 5 pos switch into ecu. Truck got a p0193 code. I replaced the fp sensor, fpr, fuel filters, new batteries (truck was due for them) I shot wiring on the fuel pressure sensor.Feb 4, 2016. OK guys since I am new to diesels and Duramax I have a question. I have been told by a couple of Diesel mechanics when I bought the truck that at 230000 miles I need to keep an eye on my water pump. Well this morning I threw code P0128 and have notcied my truck seems to always run on the cool side like 160ish.The computer uses engine oil pressure to cycle the vanes from 0-100%. This pressure pushes a plunger, which moves the unison ring and, in turn, cycles the vanes through their whole range from closed to open. In a P003A code, the problem lies with the unison ring: it seizes up and can no longer turn its full motion.

The U1800 code is set when no comm between ECU and FICM. I have replaced 2 FICMs so far, and repaired dozens with the wires chafed at the alt bracket. I would check the wiring over again just to be sure, not just at the alt area. ... Just bought 04 Chevy Duramax 2500HD 6.6 LB7 120,000 Miles. Stalled while driving. Replaced fuel filter primed ...The Duramax p0087 code indicates a fuel rail pressure issue. This code can be caused by several factors, including a clogged fuel filter, a faulty fuel pressure regulator, or a faulty fuel pump. The Duramax p0087 code is one of the most common issues faced by Duramax diesel engine owners. It indicates that there is a problem with the vehicle ...2002 Duramax truck throwing codes: P0380, P0107, P0118, and U1800 how do I troubleshoot the cause of these? And is there - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... 2001 Chevy 2500HD 6.6 Duramax 4x4 Lots of codes. P0087 P0093 P0102 P0107 P0540 U1000 U1800.Dec 11, 2007 · Code: U1800. Modules: Description: Lost Communications With Fuel Injector Control Module (FICM) Is that the DTC you getting? Check Fuses first, then relay. <---- My udder truck :cool2: Does an 18 spd qualify ya for the brotherhood of handshakers? 2004 GMC Dmax LB7/Ally 5 spd C/C, Sierra 2500HD, 4x4. 2nd owner at 88,000....Purchased 07/07 ...2003 Chevy 3500 6.6 L Duramax. Customer put $15 worth of gas. 3/5/2024. On a 2024 Chevy Silverado, 3500 with a 6.6 Duramax engine. 3/5/2024. i have a crank no start with code U1800 LB7 Duramax injector. 3/6/2024. duramax 2007.5 defueling at an idel Duramax , 3/6/2024.Its the simplest things that cause the biggest issues with these fuel systemsIf you want to teach your kid how to code, there’s certainly no shortage of apps, iPad-connected toys, motorized kits and programmable pets that you can buy for your future Google...The wiring harness is chaffing on the air conditioning lines. Fuel filter change message. Fuel contamination. The vehicle will not start. Dirty fuel lines and fuel tank. The vehicle is very slow. The truck goes into low power. Let's discuss the causes for the p128e duramax code and their solutions in detail.The pump is mounted in the filter housing on the frame and the connector is at the front of it. The pink and black wire should have 12 volts with the key on for about 30 seconds. If the pump has voltage but is not running, then your pump has failed. If there is no voltage then check fuse 2.40 in the central junction box.The new injectors being sold such as the SAC45's have a great rep in going well beyond the normal 80 to 120K injector mile average; I believe that is due in part with them not having the need perhaps of the fuel filtered below 4 microns), so the threads on replacing injectors every 80 to 100K have become less.

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. let it run for a bit and everything seemed fine then all of a sudden died. 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. until last night was ...

nyterydr1500 Discussion starter. 30 posts · Joined 2009. #1 · Jul 2, 2011. went to grocery store and was inside for about 30 mins. came back out, started the truck like normal and it ran for about 30 sec. before dying. now it will crank but not start. fuel level is more than a 1/4 tank so that shouldn't be an issue. any suggestions or help ...6.5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004.5-2005 (LLY) 6.2L Diesel Engine Fuel System, Air, Exhaust & Emissions Upgrades Top Contributors this Month View All8902 posts · Joined 2011. #11 · Jan 14, 2020. P205B detects an 'out of range' difference in fuel and DEF temps, after the truck has been off for a certain period. Guess they need to look at the fuel temp sensor....since so far it sounds like they have just messed with the DEF temp detection. The code chart says P205B just compares the two ...Chevrolet diesel trucks use the 6.6 liter Duramax engine, which is prone to intermittent fuel starvation, water pump failure, overheating, injector failure and injector harness cha...Its throwing codes p0374, p1261, u1800. I can prime it and shoot some starting fluid, but still no fire. someone said it just needs to dry out, but its been down for over two months. Please help, thank you.chevypower Discussion starter. 153 posts · Joined 2010. #1 · Oct 21, 2011. my truck has started throwing this code p0108 going up hills after a downshift any ideal what i need to do. thanks for any help. 06 Lbz reg cab 3500 4x4... 4 in. straight, egr block plate, air dog 100 and fprv shim ... I have efi live v.2 using to data log and clear codes.Jan 2, 2011. #5. U0100 code. My duramax recently threw a few codes U0100 lost com. w/ ecm/pcm module A. P0700 trans control system malfunction. P0181 fuel temp sensor malfunction. P0116 engine coolant temp malfunction. I found a loose neg. cable at the left battery. Cleared the codes and that fixed the problem.I haven't had any codes at all. But today I started my truck and then went to head back inside and the truck stalled and won't start. Shows 4 abs codes and one dsw U1000 code. I can not figure this out. 2005 Chevy 2500HD LLY, Crew Cab, Short box, Fully Loaded. Cognito Kazuaki complete suspension w/ Fox shocks, Cognito UCA's, Cognito braces ...My edge gives me a u1800 code, communication problem with the ficm.. runs fine tho, just the tranny wont lock the converter in fifth from time to time(i heard the tcm is on the same circuit as the ficm, dont know if that problem is from the edge or not) ... 02 Chevy 2500 4x4 Duramax lb7 new to me in march/13 Edge w/attitude (unplugged at the ...asked Dec 26, 2017 by anonymous. pickup will just die as your driving or plane ol wont start. also giving codes P0090, P0405, P0612, P0700. Vehicle: 2004, DURAMAX 3500. u1800. duramax.

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Sep 9, 2008 · p0370 is a generic code, could mean bad injection pump, could mean bad fuel pressure/pulse sensor. U1800 is a loss of communication somewhere in the circuit. The fuel injector harness has a rubbing issue and then the connectors coming loose. Visually check to see if there is any chaffing, rubbing, along the fuel injector harness.33 posts · Joined 2011. #3 · Nov 26, 2013. I had that code pop up and P003A. I searched the forums and it looks like the P2563 code is pretty common. From what I found, a lot of people will try cleaning the sensor and wires 1st, then replacing the sensor and/or solenoid, then end up taking it to the stealership and replacing the turbo.Some forum posts on other sites state that weak batteries may have something to do with the communication problem between the FICM and the ECM causing the U1800 code. If your truck cranks, but does not start, and continues to throws the DTC U1800, the fault could be in the FICM, or the FICM power and ground circuits.There were other codes for the glow plug circuits, but I only concentrated on the main code (U0106 -lost communication with glow plug control module). I used my Snap On Solus Pro scanner and was able to check the code and operation of the control module. There was no response from the controller.2017 L5P Duramax Code P026D. For those folks who may have the check engine light come on and the following code comes up: P026D, I want to let you know that, for me, it was the MAP sensor being dirty. It has happened twice in the last few months, and I have been able to clear the code by cleaning the sensor.Bought a non running lb7 Duramax, told it threw a fuel pressure regulator code and the truck came with the new regulator so I replaced it. Went to fire it up after the replacement and nothing. ... So I scanned the code, and the problem became a lot more concerning I had a u1800 code which is no communication between the ECM and the ficum. So I ...Group 2-DTC P2149 with injectors 6 and 7. Group 3-DTC P2152 with injectors 2 and 5. Group 4-DTC P2155 with injectors 3 and 8. When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the affected group of fuel injectors. Conditions for Running the DTC.2003 GMC duramax... 2003 GMC duramax 3500 has codes p0370 u1800 p0489 p0404 p0089 p0101 wont start. Occam's razor is a problem-solving principle attributed to William of Ockham (c. 1287–1347), who was an English Franciscan friar and scholastic philosopher and theologian. The principle can be interpreted as stating Among …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. let it run for a bit and everything seemed fine then all of a sudden died. 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. until last night was ...My 04 silverado duramax blew the edm fuse. replaced now only running of 4 cylinders. throwing codes p1226, 1229, 1235, 1244. also a u1800. Is the ficm bad? ... 05 chevy 2500hd 4x4 6.6 duramax diesel code p2149 fuel injector group b supply voltage circuit open p0208 injector circuit open #8 I assume that the injector is bad could i get the ... ….

If you're looking to get more of a specific vitamin or mineral in your diet, or you're wondering what types of produce will help you get which types of nutrients (and what those nu...2001 6.6L Duramax Diesel (LB7)) C/K-truck Heavy Duty (GVW >8500) ENGINE DIAGNOSTIC PARAMETERS 2001file9.doc 2001file9.doc P0094 1. Delta RP @ DFCO 2. fuel flow range check @ DFCO Fuel System Small Leak Detected 1. Delta rail pressure <= 30MPa 2.Commanded pump flow is less than 6000mm3/sec @ 40 MPa, 5740mm3/sec @ 60 MPa,Check 4: Bad Diesel Engine Fluid. It's time to go through the diesel engine fluid reservoir and check Whether there is any defect or not. Solution: Once it is contaminated, you have to change the fuel filters and injectors. Besides, give a check over the HP fuel pump.What does OBD-II fault code U1000 mean? Code U1000 stands for Communication Area Network (CAN) Lost Communication. Modern vehicles use a data bus to allow communication between onboard computers. This data bus is called a communication area network (CAN) and the computers are referred to as modules. A typical late-model vehicle has many modules ...To diagnose the U1800 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.3/4tonfun. 54 posts · Joined 2014. #9 · Oct 14, 2014. I recall reading something about a faulty wif sensor causing a no start , p0370 condition when plugged in . Might be something to look at . 2005 GMC 2500hd , Xtreme FX EFI Live v2 dsp5 , AFE intake , magnaflow 3" dp , 4" dp back flo-pro exhaust , fass lift pump . Like. jc1843.If that fails and if your truck does not start and throws the DTC U1800, the fault could be in the FICM or the FICM power and ground circuits. Disconnect the battery's and double check the FICM connectors for any debris. f the truck is only giving you only the U1800 code the problem is just in the FICM or the FICM power and ground circuits.So your having problems with the shift range inhibited and it's going in to limp mode and acting weird? Well I'm here give you some help! 1.Check your plug a... U1800 code duramax, Ron, you seem to be the guru on every forum I go to looking for this p0193 code. I have a 06 lbz duramax. Loaded a tune onto truck, truck ran fine. Pinned the 5 pos switch into ecu. Truck got a p0193 code. I replaced the fp sensor, fpr, fuel filters, new batteries (truck was due for them) I shot wiring on the fuel pressure sensor., If that fails and if your truck does not start and throws the DTC U1800, the fault could be in the FICM or the FICM power and ground circuits. Disconnect the battery's and double check the FICM connectors for any debris. f the truck is only giving you only the U1800 code the problem is just in the FICM or the FICM power and ground circuits., Ron, you seem to be the guru on every forum I go to looking for this p0193 code. I have a 06 lbz duramax. Loaded a tune onto truck, truck ran fine. Pinned the 5 pos switch into ecu. Truck got a p0193 code. I replaced the fp sensor, fpr, fuel filters, new batteries (truck was due for them) I shot wiring on the fuel pressure sensor., My 04 silverado duramax blew the edm fuse. replaced now only running of 4 cylinders. throwing codes p1226, 1229, 1235, 1244. also a u1800. Is the ficm bad? read more, 2001 chevy 2500hd 6.6 diesel u1800 code truck runs great but the sev eng lite stay on i checked all wires & conect to icm ... I have a 2003 Chevy 2500HD 6.6 L Duramax (LB7) Diesel. I am getting P0404 code and the check engine light comes on., Once I brought the truck home, I checked for any codes and came up with P0090 (FPR), P0380 (glow plugs), P0700 (trans MIL), U1800 (Lost comm with FICM). I cleared the codes, checked and cleaned the battery connections, charged and load tested the batteries, checked all fuses and tried cranking it over and as expected, it didn't start., Ran my dashcommand app after driving it home, got the following codes: P0700 U1800 U2104 U2105 U2106 P1093 - This one is new, low fuel rail pressure during power enrichment? I just changed the fuel filter (on friday, today is sunday) Also got balance rates with truck idling, warmed up with nothing else on: Cyl 1 : -3.3mm Cyl 2 : 0.3 mm Cly 3: 0 ..., New member. Need some ideas here. Got a 2004 Duramax with the LB7. Flashed it with EFI Live Saturday night and after flashing, truck didn't start. Pulled out ECM and bench flash stock tune back in then flashed other tunes back in and still won't start by the ignition. All I keep pulling for codes is u1000 and there's 4 of them., May 20, 2010 · Yes. The ECM lost communications with the BCM. There is a serial data network between the two Modules. A bad connection could cause loss of communications (i.e. dtc U1031). Maybe it was only momentary and has reconnected. You may want to clean the connectors to the BCM or ECM. '18 Ext Cab Z-71. '16 Reserve 26'., 223000 miles without electrical problems, but halfway out the driveway today it shut off and refused to start. I have a code u1800 for no communication between ecm and ficm. Preliminary check on the wiring and fuses revealed nothing, but I don't have power …, 2003 Chevy 4500 6.6 Duramax U1800 code ficm not responding Crank no start - Answered by a verified Technician ... 2002 Chevy C4500 6.6 Duramax P1093 P1094 codes we ..., It's throwing codes on the OBDII snapon scanner. It's throwing a U1800 code for the FICM. We replaced the fuse, KISS method... didn't help.. we traced the wires back to the ECU and now we are going to trouble shoot from there. I understand the U1800 isn't caused by lack of priming., 2003 HD 2500 with duramax will run short time and then die. Throws code u1800. Let set say maybe to next day and starts up fine but then dies again in say 10 minutes or so. Sent FICM in to be redone b … read more, There were other codes for the glow plug circuits, but I only concentrated on the main code (U0106 -lost communication with glow plug control module). I used my Snap On Solus Pro scanner and was able to check the code and operation of the control module. There was no response from the controller., Nov 6, 2017. P20ee. I have a new 2018 2500 Chevy Duramax. I only had the truck 3 days and I already have the engine light on. Had onstar check it and it's the P20EE code. I cleared the code and 3 days later the code is back again. I was going to make my way 1 hour to my closest dealer, but then seen this thread., The motor, sometimes referred to as Baby Duramax, was slated to be offered in GM's light duty pickup trucks - the Chevrolet Silverado 1500 and GMC Sierra 1500 - for the 2010 model year., Wynyard Saskatchewan. May 28, 2011. #1. I have a 2004 duramax that i reciently changed the fuel line that goes from my fuel sending unit to my steel feed line.. I also replaced my fuel filter housing because the truck was loosing prime.. I primed the fuel filter without the bleeder screw in and it filled the filter as it is supposed to..., Pulled the codes and the codes are; P0700 U2105 U2106 U1800 ... DTC U1800, U2104, or U2106 will set, depending on what communication is lost. ... 2003 2500HD LS CC/LB 4x4 Duramax/Allison Completely Stock 273K miles on the original stock injectors. Front Bumper Replacement, The automobile fault code U1800 indicates a problem with the Fuel Injector Control Module (FICM) in your vehicle. The most common symptom is the Engine Light ON or Service Engine Soon Warning Light. The cause of this fault code could be a faulty FICM, an …, It would be stuck in whatever gear it was in at the time. It might happen in the driveway or 4 hours later in another state. When it threw the codes it sounded like a thunk, clunk in driveline. If you pulled over and shifted from D to R, it sounded like the driveline was going to fall out. It would throw P0700 and U2106., It would be stuck in whatever gear it was in at the time. It might happen in the driveway or 4 hours later in another state. When it threw the codes it sounded like a thunk, clunk in driveline. If you pulled over and shifted from D to R, it sounded like the driveline was going to fall out. It would throw P0700 and U2106., I have a 2013 6.6 Duramax with 156,000 miles. I am getting the following codes; P11CB NOx Sensor 1 Performance - Signal High, P140C Exhaust Gas Recirculation (EGR) Slow Response - Decreasing Flow, and P0101 Mass or Volume Air Flow A Circuit Range/ Performance., U codes are the worse. Could be wiring or computer. It could possibly be a shorted sensor pulling voltage down on bus. Iv spent days going over all the run spots fixing anything damaged and still no pulse to injectors. If you could find a good used FICM and replace it to rule it out. Spent days on the LB7 with the lost comm to FICM and ended up ..., Have you ever brought it back in for your code. #PIP5523 DTCs P1338 P1339 P133A P133B P133C P133D P133E and / or P133F Set. - (Sep 26, 2017) #PIE0401 Bulletin 04-00-89-053 Engineering Information - Malfunction Indicator Lamp Illuminated with One or More Glow Plug Control DTCs Set - (Mar 9, 2017), 2004 Chevrolet silverado 3500 6.6 Duramax code 1550 and only starts briefly dies and sets the code while trying to start - Answered by a verified Chevy Mechanic ... My 04 silverado duramax blew the edm fuse. replaced now only running of 4 cylinders. throwing codes p1226, 1229, 1235, 1244. also a u1800. Is the ficm bad?, Bought a non running lb7 Duramax, told it threw a fuel pressure regulator code and the truck came with the new regulator so I replaced it. Went to fire it up after the replacement and nothing. ... So I scanned the code, and the problem became a lot more concerning I had a u1800 code which is no communication between the ECM and the ficum. So I ..., 36 posts · Joined 2018. #1 · Jan 11, 2022. Hi 2017 duramax. All stock and recieved the P1050. Dealer said they replaced the DEF tank and sensor. After I picked up truck on next start dame code. Thoughts please. 2017 3500 High Country. Save Share., U1800 Code I think Aaron has it correct with one word that needs revision. The original problem was a high resistance connection vs short, that set up some type ... The Duramax also uses a two-stage fuel pump, but rather than utilizing a diaphragm-type pump for lift, a pair of spur gears, Nov 20, 2017 · DTCs U1800 and P2149. 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 communication “U-codes.” I found codes U1800 and P2149., 2017 L5P Duramax Code P026D. For those folks who may have the check engine light come on and the following code comes up: P026D, I want to let you know that, for me, it was the MAP sensor being dirty. It has happened twice in the last few months, and I have been able to clear the code by cleaning the sensor., 8. Since you're apparently not currently getting a U1800, I wonder if that "old" code was just the result of tinkering. The only time I ever got a U1800 was when I had water intrusion into my FICM because the rubber plug on top of the FICM had dry-rotted and fallen out., The cost of repairing a P0380 code on Duramax can vary depending on the severity of the problem. Replacing just the glow plug relay may cost as little as $50. However, if you have to replace the glow plugs, the price will go up. You can expect each plug to cost between $70 and $150. On the other hand, the entire glow plug control module can ..., It wouldn't start. Pulled codes and got U1800 and can't remember but I think P1226 also. If you look these codes up, it is a comm failure between the ECM and the FICM. All the instances of this on various diesel sites people find wires rubbed bare and grounded to the alternator bracket and such.