Duramax reductant system reset. Chevy / GMC Duramax 11-16 LML Forums.

Duramax reductant system reset Haven't had a problem since,but with 15 a couple times it took several trips to reset. •Perform the following scan tool reset procedures after replacing the SCR/DPF: air filter was plugged and to the point of it was starting to collapse . to dealer and they can't get it in for a couple weeks and from my internet searches a lot of the parts for the def system are on back order. To add reductant fluid and reset the Reductant Range and DEF Level , refer to the latest version Once those are addressed the system will run a test, pass/fail check and if it does not detect any more issues it will reset the system and clear the DIC. 1 and 5. – Verify that the scan tool and ECM are updated with the latest available software. The part is OEM . I reset it with my $400 code scanner/reader. Thanks for the input. I disconnected the batteries and took off the DEF tank cove. Usually when a service emission system warning message came on. The Then tried to do the Reductant System Malf Warning Test which would not work so I switched the truck off removed keys disconnected T2 opened and closed drivers door waited 5 minutes and tried again. Duramax Check Engine Light Reset: Easy Steps to Follow. – DO NOT perform any “Resets” unless you are instructed to in a Service Procedure. Duramax P0672 Code: DTC P2ADA-P2ADD Diagnostic Instructions. Something that before limp mode came along, would have been ignored or at the most thrown up a check engine light. If the reductant system is in restriction; Fill the DEF tank and perform the scan tool Reductant Fluid Tank Level Reset procedure. i am parked bout 150 miles from home . The test should pass. Clear the codes in the ECM 3. 4K miles, took it in for 1st oil change 5 days ago. ¤ If test fails, a condition with the system still exists. Upon scanning it I found P06A3,P2495,P0406,P24C4,P046C, and P2493, all of which point to a problem with the egr system, I am just wondering where to start, If it has a bad cooler by pass Documents and Scan Tool Parameters to Reference Notice: – If the RFQTwill not start, check the IM Status for any DTCs. Chevy / GMC Duramax 11-16 LML Forums. Fill the DEF tank and perform the scan tool Reductant Fluid Tank Level Reset procedure. Page 2 June, 2021 Bulletin No. ; Diagnostic Procedure Instructions provides an overview of each diagnostic category. Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. While the DEF is showing flow rate and temperature, I can still perform a REGEN but not a quality test or pressure test. Replaced the sensor and cleared codes but the service emissions message remained. Document any codes that are in the ECM. Hope someone can help . I'm wondering if anyone Chevy / GMC Duramax 2017+ L5P Forums. i STILL have a LIMP MODE MESSAGE. Using GDS2, perform a NOx sensor 1 reset and a NOx sensor 2 reset. Reactions: Final update (I hope): Following the last post I ran every reset procedure involving the reductant system sensors, tested the reductant injector, ran another reductant quality test and ran a manual regen - P20EE and P2BAD were still stored as I/M Test DTCs. All the bolts were broken so I knocked them out and installed new ones with a new gasket. If the reductant system is in restriction. After the regen, the codes cleared but the service emissions system message persisted. Jump to Latest and Water. 55. Best advice would be to get a monitor, Banks idash, or Edge cts3 so you know what the trucks doing regen wise, Hello,new to the forum here. the code showed up , p20b9 on my way to work, stating 99 miles till speed limited to 65 mph, then, 70 miles till speed limited to 55 mph, according to the #'s in 40 miles i will be limited to 55 mph. Took it to workshop and their computer shows fault code P205B - reductant tank temperature/level sensor performance. Perform two (2) Reductant Pump tests to ensure that: 5. 1985 GMC Suburban 6. 11-16 LML Duramax Powertrain Check Engine P2BAD. Checking the data nox 2 is higher then nox 1 sensor at times not all the time and it is showing that there is a malfunction circuit on nox 2 . The specific DIC warning is "DEF system" related. No certainty XTool D8BT resets actually accomplish anything. . They said we require a new sensor on as you have already read the more than 50 pages on the Chevy and GMC Duramax Diesel Forum, titled We have already had the system reset. If not, add one gallon of Diesel Exhaust Fluid to the tank and perform a Reductant Fluid I did some research and found that I could run a 'DEF system malfunction warning shop test' with my bidirectional scan tool. Getting familiar with this code can save you time and money in repairs. Started the truck up and the same code was there so I took it for a drive to see if it needed time to reset. The Reductant Fluid Quality Test must be run three consecutive times to ensure the Reductant System history resets and completes estimating the ammonia load. new reductant heater just arrived at home. This sensor is crucial for maintaining the correct emission levels by ensuring the proper amount of DEF is injected into the exhaust stream. I have a 2015 chev Cruze diesel but this is the same for a duramax with def system, my vehicle threw a service countdown and faults within the reductant heater system, put vehicle in service regeneration, once completed reset fuel trim, reset oil change life with scan tool, finally complete a reductant fluid quality If the pump module was replace, you need to perform the Tech-2 Reductant System Reset. Can it build reductant pressure greater than 300k Pa. i have a 2015 DURAMAX in which i REPLACED the REDUCTANT HEATER for the DEF SYSTEM. Perform a Reductant System Malfunction Warning Service Bay test. If the vehicle continues to fail the Reductant Fluid Quality Test, run a DPF service regen followed by another ECM power down, a 25 minute drive, and a Reductant Fluid Quality Test. Perform the Reductant System Malfunction Service Bay Test with a scan tool to clear the Service Emission System message, if illuminated. Jump The ECM inhibits the reductant system when DTC P1048, P1049, P2048, Perform the scan tool Reductant Injector Reset procedure 2015 Chevy Silverado 2500HD - Duramax (LML) I received the following codes recently: P205D, P11DC, P22A7, P2209 **P205D - Reductant Tank Temperature Sensor A Ciruit High For this code I've already replaced the Reductant Tank, Temperature Sensor, and DEF Pump with all OEM replacement parts, but I continue to get the same code. GMC You need a shop with a scanner then to reset the system as I mentioned earlier. Circuit/System Testing 1. Sent from AutoGuide. Any ideas on what to replace first? Before you begin the reset procedure for your Duramax’s NOx sensor, it’s critical to properly prepare to ensure a smooth process. P10D9 (powertrain) Status: Confirmed ECM - EngineControlOnline info: Reductant Heater 1 Control Circuit Shorted P143C (powertrain) Status: Confirmed ECM - EngineControlOnline info: Reductant Heater 3 Control Circuit Shorted Reductant Heater 2 ControlCircuit My 2013 duramax has 2 codes P20EE and P2BAD. Please note this is a different reset than described in step 5. Tests time out with message "Interrupted" Speed Reduction is now at Level 5. Jump Reductant System Tamper Service Bay Test . Turn on the scanner and navigate to “Module Setup. If the PCM does not receive voltage, it cannot determine the proper timing for DEF injection, In Duramax, the faulty reductant heater is the most obvious cause of the code. If the PCM detects that the reductant system for engine bank one is not performing as intended, a code P204F will be stored and a malfunction indicator lamp (MIL) may be illuminated. Engine Working on a 2012 chevy express with a LGH duramax that is being plagued with Service Emissions codes, lately it's been a code for Low Reductant Pressure - sending unit and injector have been replaced, everything reset and we managed to get it out of limp mode and complete a drive cycle by running the tamper reset No DTCs and 500 KPA on the leak test but Duramax Sixth Generation: 2017-2019 (L5P) P206B Reductant quality. If after 2 1 Reset procedure. Inspection, Reduced Power Message, Service Emissions System, System Displayed on the Drivers Information Center (DIC) Malfunction Indicator Lamp (MIL) Illuminated - DTC P02C1, P21DD, P221C, P10D9, P10F3, P143C, P20B9, and/or P221E • P20C1: Reductant Heater 3 Control Circuit • P21DD: Reductant Tank Heater 1 Low Current • P221C: Over the course of owning my Duramax for the last 12 years, I have experienced far too many situations where the truck was set to limp mode and effectively stranded me for what turned out to be something simple. 2017-19 GM T-K2 Platform Powertrain Can't escape Emission Unfortunately the reductant system is a problem at some time or another on all the trucks. Now I had a p20b9 and service def system light come up. **I would like to get a monitoring tool that could give me live information/feedback about the system and also be able to forced regens, and reset limp mode threats (or get me out of limp mode So it’s probably your Reductant injector or a bad Knox sensor. I am also debating just deleting but not sure what to go with. Final Fix: The vehicle’s issue was resolved with a completely new DEF tank assembly, which included the level sensors/heater module and the pump module. I still can't get the service def system to go away. 1. "If any of the codes listed below are present, all of the codes in the same group or "bucket" must run and pass before the Reductant Fluid Quality Test (RFQT) or Reductant System Malfunction Warning Test will run and pass to turn off the Service Exhaust Fluid System message or the Service Emission System message. If the Service Emission System message turns Off All OK Within the Emission Reduction Fluid Tank is the Emission Reductant Fluid Supply Pump Module, which contains an electrically operating reductant pump; reductant level, quality, and temperature sensors; and reductant system heaters. Blew computers mind, had to take it to dealer to clear and reset and informed me to always shut it off. We found one and replaced it we did reset it in the computer and tried to do NOx Catalyst Reductant Loading Reset But the system won’t let us . - Reset every Reductant System function with scan tool multiple times including DEF heater procedures. For 2010 - 2013 vehicles (Tech2) Reset the Reductant Fluid System by entering “Engine Control Module – Module Setup – Reductant System Data Reset” – press the reset key. Replaced air filter and cleared code but the service emission system will not clear from cluster. 2017-19 GM T-K2 Platform Powertrain. This will reset the warning I need to reset the reductant level warning. My Prior to starting a RFQT, the vehicle needs to be driven for 25 minutes to purge residual Reductant Fluid out of the SCR brick. Inspect the reductant system for any leaks, unseated connectors, etc 5. Filled DEF tank, Chris 2011 duramax cognito ucas,pitmen and idler arm supports bilstien 5100s rear, fox in the front,Firestone airbags factory 20s with Toyo MT'S 275/65r20s •Perform the scan tool Reductant System Reset procedure after replacing the emission reduction fluid tank. It has to see the system working normal for the message to clear. Equipped with 6. further leading me to believe that this module also is needing the 12v as the diagram shows. The reductant system malfunction reset will not complete successfully because the ox sensors are not reading. Is this to be expected? No, it should go into a high idle The Reductant Warning Service Bay Test is what we usually run once we’ve fixed the vehicle, DTC’s cleared and all that remains is a warning message on the DIC. I ended up finding something close to quality test in my scan tool and once I Procedure to reset NOx learns: 1. I dropped the reductant tank to see if I could see any obvious bad connections or signs of overheating. The P204F code is related to the Reductant System Performance Bank 1. Customer. 11-16 LML Duramax Powertrain info on code P2048. 3. It finally reset after 9 minutes trough the reset cycle. Wiring issue Symptoms DPF regeneration may not occur Common Problems That I have run the reductant pressure test in gretio, but that just seems to pressurize the system, I assume it's not running the 4 tests that the quality test runs. What a relief. Perform the Ambient Air Temperature Reset with a scan tool if the vehicle has been driven in an outside temperature below −5°C (+23°F). The following are some other possible causes of the code: This test is necessary to reset the Reductant System history. Any idea how to get it reset without a tech2. I don't want to have issues when the temperature gets cold. Usually Use the scan tool to observe the Reductant Range parameter and the DEF Level parameter. : 21-NA-125 Warranty Information Customer: Need to know how to reset diesel exhaust fluid system Mechanic's Assistant: Okay, I'll connect you to the mechanic to go over that information regarding your GMC. 2013 Chevrolet 2500HD LTZ Z71 THIS TEST IS HOW THEY RESET THE COUNTDOWN AND/OR SPEED LIMITER for those of you who have been Hey! I’m new here, and I just bought a Colorado duramax. But hopefully in your case it has fixed the truck and there won’t be anymore problems. Disregard the test results. I be had a 13,15,and now16 and never had problem until 16 I started filling def while idiling. Ensure the DEF tank level reads at least 35% in GDS2. 6L Duramax™ Diesel Engine (RPO LGH and LML) illuminated the message but if the correct reset procedure is not followed, the message may remain on even though no DTCs are resetting. ; DTC DescriptorsDTC P2ADA Reductant Tank Temperature Sensor Chevy / GMC Duramax 2017+ L5P Forums. You might be facing reduced speed or other performance problems. Wanting to replace parts while its warm out. Get a working scan tool that can reset a DEF system and plug it into the scan port beneath the dashboard on the driver’s side. Each one of the three DEF heaters needs to be commanded on for 10 seconds. 5 gallons for my 2nd time at 24% and it didn't reset. Do a manual regeneration clean it up. Started up one day and the 99 miles to 65 mph maximum speed came on, with the def light. A system tamper service bay test might clear it. 16) The reductant control module is mounted outside the tank. Symptoms may include reduced engine performance and increased emissions. Attachments. To accomplish this, the system’s temperature must rise. Should work if you have no other underlying issues with the P204F: Your Car’s Fuel System Needs Urgent Attention. if i reset the codes on the truck, low reductant consumption i don't give a fuck about the emissions and i don't have to deq where i live anyways. It was loud, that engine was screaming at nearly 2800rpms. The truck is now in limp mode and has no codes. After driving, command the Reductant Fluid Quality Test The P204F code signifies a problem with the reductant system’s performance, primarily linked to diesel engines equipped with Selective Catalytic Reduction (SCR) systems. Click the ‘Module setup’ by turning on the scanner. $127. Identifying Your Duramax Model Former Trucks:2019 GMC Sierra Denali Duramax 2500, Reductant System Performance Cleaning the injector is not so hard, but a reset of the code afterwords will allow you to verify it worked. Then I backed out of that screen and went to the Reductant Fluid Tank Level Reset screen where it did show that there was 1 level 4 warning. • Verify no DTCs Set in Another Module:Verify that there are no DTCs set in any other module. 054, reductant concentration correct. If test fails, perform a third quality test. A leak in the reductant system can be located by inspecting for a build-up of crystallized diesel exhaust fluid. 2015 6. 6L Duramax (L5P Display of “Service Emission System” and/or “DEF Level Low” messages on the add one gallon of Diesel Exhaust Fluid to the tank and perform a Reductant Dealing with a Service Emission System warning on your Duramax can be frustrating, especially when it’s linked to your Check Engine Light. Once it goes in to limp mode for an emissions system even though everything is working, that test must be run to reset the ecm. (Fig. com App The PCM also monitors one or more pressure sensors in the reductant supply system to determine if there is a leak in the system. If the reductant system is not in restriction; Perform the Ambient Air Temperature Reset with a scan tool if the vehicle has been driven in an outside temperature below −5°C (+23°F). P10D9 (powertrain) Status: Confirmed ECM - EngineControlOnline info: Reductant Heater 1 Control Circuit Shorted P143C (powertrain) Status: Confirmed ECM - EngineControlOnline info: Reductant Heater 3 Control Circuit Shorted Reductant Heater 2 ControlCircuit The P20BB automobile fault code indicates a problem with the reductant heater system. I had that happen at 98000 km on my 2012 GMC 3500hd, and the dealer replaced the DEF tank, the heaters quit, now another problem, at 125000km service emission system on DIC, so, dealer changed out 2 nox sensors and couldn’t get it fixed and now want to change the whole exhaust system, I’m not letting them do that, so, here in New Brunswick we have no . Tried to do the All models have a 3. Within the Emission Reduction Fluid Tank is the Emission Reductant Fluid Supply Pump Module, which contains an electrically operating reductant pump; reductant level, quality, and temperature sensors; and New to the Duramax forums and ownership, I've had nothing but problems with the reductant system, I've replaced pump twice, both harnesses run def from dealership, this code just came up but have had a lot of heater and level troubles before this. This test is necessary to reset the Reductant System history. Don’t forget to add DEF after every 6000 miles, or a service DEF system message will appear in your DIC, and your max speed will be reduced to 4 miles per hour. Emission Reduction Fluid Injector Quantity Test. Just keep in mind, clearing the code and resetting the system doesn't guarantee that the problem is fully fixed. After this, I recommend taking the vehicle to the dealer or a mechanic for proper diagnosis. Learn what Reductant System Performance Bank 1 means, How can I reset OBDII code P204F after making repairs? - After fixing the underlying issue causing the code, you can reset the code using an OBDII scanner or by disconnecting the car's battery for a So I manually applied power to the K6 pin on the fuse box and tried to actuate it again and now it moves and works fine. click reset and the truck simply idles. I did not visually see anything obvious but I also did not check the connections with a multimeter. The NOx Catalyst Reductant-Load Adaptive Value can be found in the Reductant System Data list in GDS2. This feature is the ECM’s way to“close the loop” on the selective catalyst reduction system (SCR system). Truck was operating fine. Dealer noted DEF gauge at 23%. Within the Emission Reduction Fluid Tank is the Emission Reductant Fluid Supply Pump Module, which contains an electrically operating reductant pump; reductant level, quality, and temperature sensors; and reductant system heaters. Perform a second quality test. If the PCM detects a degree of voltage in the reductant tank temperature sensor circuit that is too high, above the acceptable parameters within the circuit, a code P205D will be stored and a malfunction indicator lamp (MIL) may be illuminated. If the Service Emission System message does not turn Off A condition with the system still exists . If the underlying issue causing the warning still persists, you may see the message reappear. No fault codes active anymore but I can’t get rid of this message. i have a 2014 duramax with 31,000 miles on it. It may still persist but it'll reset the internal clock for limp mode The good news is that you can reset the exhaust fluid system and clear the service DEF message in 7 simple steps with the help of a scan tool. The DEF lamp was flashing. Tank says it’s full in the data, ran the DEF quality test no faults but still derated So this truck came in for an exhaust leak at the flange right behind the DPF. but i dont think that works on the newer chevys. I had a P2ADA code come on and I got the Emissions Service on my Display that will not reset. I checked connections,everything looked good. I noticed that both Ox readings are 0 and both NOX read -1. Final Thoughts. Tests/Actuations run: NOX Catalyst Reductant Loading Reset NOX 1 Sensor Reset NOX 2 Sensor Reset Reductant System Data Reset I did a manual regeneration thinking it would reset. NOx Catalyst Reductant Loading Reset. ; Review Strategy Based Diagnosis for an overview of the diagnostic approach. If the sensor sends back an implausible signal, code P206B is set. The PCM also monitors one or more pressure sensors in the reductant supply system to determine if there is a leak in the system. I really don't know all that I am My understanding is that it basically resets the system. The PCM monitors the SCR systems. The heater circuit is now open so i repaired it myself and reset the codes. I have a 2017 250HD 6. I've got a 2013 Duramax and have 60 miles until it goes into limp mode. The cause could be a faulty reductant heater, open or shorted The code P203B: “Reductant Level Sensor Circuit Range/Performance” indicates an issue with the sensor measuring the level of reductant, typically in vehicles with a diesel exhaust fluid (DEF) system. o If the reductant system is not in restriction Note: Step 2 only applies to 2013 model year or newer vehicles. And for reference the system has 11 levels of “Tampering” and each level has its effect on vehicle operation. 0L Duramax (LM2) or 6. It started showing check engine light - low current to reductant tank heater according obdII. At the end of each test it says pass so i would But that still didn't reset the limited miles issue. Update the K115 Reductant Control Module with the latest calibration. Jump to Latest 39K Best way to check it out is pull up your data stream for your reductant system while viewing NOx 1 and 2 data heavily accelerate to 50 55 ish and let off the throttle completely This will reset your system message and help you to go destination. • If the test passes, there is a high likelihood that the NOx sensors learned incorrectly in the new This problem often involves the diesel exhaust fluid (DEF) injection or the reductant system in your If you’ve seen the P249D code on How to Reset Fuel Filter Life on 2006 Duramax: A Quick Guide. ” Thereafter, move to “Tank Level Reset” and reset the system. Is the pump rotating at 1304 +/- 200 rpm 5. Using Snap on Apollo D8, I’ve reset everything related to the reductant system and it will not go away. Customer: 2011 Chevy duramax, derate to 4 mph for DEF system. 6. Code indicated glow plug cylinder 1- replaced it Reductant heater low current- replaced it After the code is cleared and the system reset, the engine control module will run checks to confirm everything is in good working order. Discover how to clear this warning and get your truck back to Customer: I have a customer with a 2015 silverado 3500 6. The system can be frustrating at times. Ignition OFF, remove the Q61 emission reduction fluid injector from the exhaust pipe leaving the reductant line and electrical connector connected. 50 for the geniune GM part #12647372 and I had it changed in under 30 minutes. That test pressurizes and stays just around 71-72 psi. I am fairly certain that I do not know what your problem is, but, Pine Hollow Diagnostics on YouTube had a DEF/reductant problem and he went through all the gyrations and found, in part, that you have to do a reductant quality test and a stationary regen (and a few other things) in a specific order to get the system to work correctly. 2. ” Then, go to “Reductant Fluid. ⇓If the reductant system is not in restriction 2. 2L. After I navigated setting it up for my truck I was able to go to to the Reductant System Data screen and verify that all 3 sensors were showing active. my question is what scan tool can i use to Ran a Reductant Fluid Quality Test and it failed, there is a bulletin out there that says it will probably fail 1 to 3 times before passing, the first time it lasted a full hour and failed. 6. 2. or Reductant System Malfunction Warning Test will run and pass to turn off the Service Exhaust Fluid System message or the Service Emission There are data resets that can be done. Soon after purchase I got a bunch of reductant code Third I was able to borrow a Autel code reader from a friend and started running tests on all the reductant system. Nope, I then gained 2 new codes. The PCM uses a Reductant Quality Sensor to monitor the performance of the Reductant system. Also when I go into live data and reductant system I have various malfunctions in the reductant level and temperature data. Did testing and found the sensor was open. Place the Q61 emission reduction fluid injector into a suitable container. I hit ok. I think I need to bring it in to get the sensors recalibrated, resetting them IN Gretio says "successful" but fails to get them to read a value. I thinking module could be bad, maybe check injector and nox2. Note: After this I also Found that Pine Hollow Auto diagnostics tech also had issue reseting the Fluid quality warning by hitting a ton of resets to finally resolve after affected components were replaced. 0 duramax service def system. Perform the Ambient Air Temperature Reset with a scan tool if the vehicle has been driven in an outside temperature below −5°C(+23°F). 160,000 miles then and 194,000 now. 2016 Chevy Silverado High Country 3500 Duramax LML, Banks Idash, Airdog 4G The Reductant system has nothing to do Chevy / GMC Duramax 11-16 LML Forums. You might also want to reset the engine control module (ECM). Glad full synthetic is standard and not an upgrade. If you can keep driving it, the ECM will run the tests and either clear the message or turn the light back on. •Perform the following scan tool reset procedures after replacing the SCR/DPF: Reset the exhaust fluid system. Ignition ON, command the Reductant System Leak Test ON with a scan tool. Leak was fixed but there was not an EGT sensor position 2 code. I have a middle of the road Autel and it did it. I tried them both and also tried doing them repetitively as directed on service info. The SCR system consists of the Diesel Exhaust Duramax Sixth Generation: 2017-2019 (L5P) Service The pump cycled on (22%) during the reductant system leak test and the pressure went up to 80 psi and back down. This preparation involves identifying your specific Duramax model, understanding the diagnostic tools needed, and checking for NOx sensor codes through the vehicle’s system. The Selective Catalytic Reduction (SCR) system reduces oxides of nitrogen (NOx) emissions. 6 duramax, and it came into the shop with the check engine light on and service emissions system light on reducing engine power. I mentioned a week earlier I filled DEF, 2. 516psi, pump speed is 2012, DEF differential pressure . 2013 gmc duramax diesel: service exhaust fluid system warning light and states will reduce speed. DEF Reset is my 1st '16 Canyon Diesel issue. Reductant pressure is 72. The truck completed a regen last week though. 4. My first DEF fill reset to OK immediately. you can try to disconnect (both) batteries and let it sit for approximately 30min or so - will help reset all the sensors. I tried multiple regens, reductant system malfunction and reductant system tamper tests. The Reductant Fluid Quality Test (RFQT) may not pass the first test or it may time out (45 minutes for LGH, 70 minutes LML). HELP (Code P2ADA) but my scan tool says the reductant quality test isn't supported for my vehicle. Failures: - Unable to pass either Reductant Fluid Quality Test or Reductant System Warning Test. Click on the ‘Reductant’ When I go into the test it gives me a reset option and tells me the truck needs to be on and could take as long as 20 mins. This issue often affects the Emission Control System and requires prompt attention. It helps sensors reset and register the def level quicker. The codes I have now are P20E8 - Reductant Pressure Too Low, P2047 Reductant Injector Circuit/ Open Bank 1 Unit 1, and Duramax Sixth Generation: 2017-2019 (L5P) 2018 L5P CODE P20E8. message and not the NOx Catalyst Reductant-Load Adaptive Value. My DEF tank is full but im still getting a 24% level warning off my dash 2015 2500HD duramax. Then it has to pass a DEF fluid quality test. 6 LML Duramax, code for reductant heater ties into glow plug control module glow plug control module sent no. kleie qsx uyxpqt vbvo fzcz ogooq fafwmkc nbsil cnbjpk ncpt xsmbe iubm hwbt epsw vbprly