P205b code duramax

2020 3.0 Duramax DTC Codes. ... Dealer downloaded codes P0476 P048A P048B, U0100, U101, U131, U140 U146 &U151. Dealer could not find anything wrong and reset the codes. At 9500 miles while pulling my 4000 lb trailer, check engine light on again and msg emission system requires maintenance.

P205b code duramax. Jan 3, 2019 · This code P205B been around since 2011 LML. If the PCM detects a degree of voltage in the reductant tank temperature sensor circuit that is not within acceptable parameters, a code P205B will be stored and a malfunction indicator lamp (MIL) may be illuminated. Multiple ignition cycles - with a failure - may be required for MIL illumination.

Duramax Diagnostic Trouble Codes . On-Board-Diagnostic (OBD) trouble codes are one way your vehicle communicates with a mechanic. Every diesel vehicle built since 1996 has an OBD II computer system that monitors and identifies issues. In particular, it looks for issues that may result in harmful and polluting emissions from exhaust gases.

#1 · Sep 4, 2015. My truck has the check engine light on this morning, scanned it today after work got p205b. Def re lated code i think? My question is I recieved a TSB for temp …Hi, my name is Robert and I am a truck driver. At Trucksauthority.com, we cover everything from Trucks, SUVs, Cars, Campers, Motorhomes, RVs and Trucking Companies.Jan 30, 2016 · 441 posts · Joined 2009. #4 · Feb 1, 2016. My truck is an '11 and it is giving a P205b reductant tank temp sensor code. Yes it's in the DEF tank and my local dealer says there on national back order. Service manager said he's been waiting on one for 3 weeks for another truck. My cel is not bothering me now it's the fluid level counting down ... 5 . Clear the Fault Codes. 6 . Start the engine. Run the engine on high idle for 2 minutes at 1000 rpm or higher. 7 . Turn the Engine Off, Key Off for 15 seconds. 8 . Start the engine. Run the engine on high idle for 2 minutes a second time. Evaluate the Results: • If P205B64 returns active: Replace the DEF level sensor. CEL for P20EE. Bought a 2021 Chevy Silverado 3500 HD SRW, CC 4x4 with the L5P in April. Back to the dealer @ 3600mi with cel and code P20ee. They diagnosed with “ Nox sensor, false reading” reflashed the ECU and cleared the code. A week and 150mi later cel and same code (now reads as a permanent code). They’ve had it for a week now, got ...NOTICE: After the first video played GM saw it and immediately took action to help the customer and take up matters with the dealer to resolve all the issues...Softr's quick revenue expansion is a good reminder that there's more to keep an eye on than just AI. No-code startup Softr, which allows its customers to build apps from their exis...

Mar 15, 2010 · DTC P0381. Wait To Start Lamp Control Circuit. Circuit/System Description. Ignition voltage is supplied directly to the wait to start indicator. The engine control module (ECM) controls the lamp by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the component ... Nov 3, 2021 · 2016 LML GMC 2500. 6.6L: Code P01F0: coolant temp dropped below diagnostic monitoring temperature. Replaced Engine Coolant Temp sensor and cleared the code. Check engine light came back after sitting over night and warmed up before heading to work. I think I have it narrowed down to possibly bad thermostats allowing coolant to flow Out of the ... You have to pay at least 100 bucks to fix the Duramax P01F0 code on your car. If you want a more durable and robust thermostat, you must pay $500. You can fix the problem yourself if you love challenges. The price of a thermostat ranges from $12 to $200.2011 Duramax's have updated software for multiple emmision's related DTC's. THIS SHOULDVE BEEN DONE THE FIRST TIME IN! 2006 CCSB 2WD LBZ Exhaust brake, by GM Kennedy lift pump, single ... They said there were numerous codes, in addition to the P205B...1. Ignition ON, observe the scan tool DTC information. Verify DTC P06D2, P168C, P168D or P2263, is not set. 2. Engine running, observe the scan tool TC Vane Position Sensor and the Desired TC Vane Position parameters. Command the TC vane position sensor in 5 % increments from 0-100 %. The parameters should remain within 2 …Drain Discussion starter. 45 posts · Joined 2007. #1 · Oct 13, 2021. So I have not updated my profile so I will lead with my pickup is a 2015 Duramax 3500 4wd (I believe its an LML not positive), I started getting the code P01F0 last spring and after driving with the code for a bit I reset the code with a code reader, apparently the weather ...GitHub Copilot, which leverages AI to suggest code, will be general availability in summer 2022 -- free for students and "verified" open source contributors. Last June, Microsoft-o...

CEL for P20EE. Bought a 2021 Chevy Silverado 3500 HD SRW, CC 4x4 with the L5P in April. Back to the dealer @ 3600mi with cel and code P20ee. They diagnosed with “ Nox sensor, false reading” reflashed the ECU and cleared the code. A week and 150mi later cel and same code (now reads as a permanent code). They’ve had it for a week now, got ...2011 GMC 3500 Duramax, getting code P204B, Reductant system, Performance Bani 1. Recently i was getting code P205B, so I changed the def temp sensor and def heater. Cleared the code and drove for a we …Learn how to create a QR code, and you can use it to accept payments, marketing, and more to engage with your customers on smartphones. Quick Response codes or QR codes are a great...63 posts · Joined 2020. #2 · Jul 23, 2020. triplenet said: Hey all. New here so sorry if its not in the right area. I've got a 2016 single rear wheel 3500 that is throwing code P205B "reductant tank temperature sensor circuit range/performance". Looking around the web this seems to be a fairly common issue possibly covered by an extended ...

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I have 2016 duramax 6.6 gmc sierra had a code p205b so i changed the def temp level bosch sensor and now the def level percentage is stuck at 18% after adding a whole ... employed. High School or GED. 25,666 satisfied customers. I have a P205B code, a P21AB code, aP21BO code, and a P203D. I have a P205B code, a P21AB code, …2017 Silverado 3500 WT L5P - 254k. Replaced DEF pump for recurring P205B and P205C codes. Added 5 gallons of DEF, and replaced controller to pump harness. Getting code P203C for reductant level sensor, can’t run any diagnostic tests on Gretio due to not showing a level. Added a picture, it appears the level sensor is …Below are common check engine light trouble codes for the Chevy/GM Duramax diesel. This list has been updated to includes Chevy/GM Duramax diagnostic trouble codes. At Thoroughbred Diesel we are a real diesel performance and repair shop that offers free advice. Call us at 1-859-737-4966 with any questions you may have about your diesel.Postmates is known for food delivery but it's dedicated to delivering anything to anyone. Here's what you need to know, plus a coupon code. We may be compensated when you click on ...Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP. Ask an Expert. Car Questions. Chevrolet Repair. This answer was rated: ★★★★★. I have a p205b code …

P205b code. Jump to Latest Follow 21 - 30 of 30 Posts. 1 2. 187058 · Registered. Joined Oct 13, 2013 · 168 Posts #21 · Dec 17, 2015. Only show this user. Here's a video of a non-dealer ... 2013 Chevy Duramax 6.6, 2500 Silverado, Crew Cab with Towing Package 4x4The video focuses on the basic Chevrolet specific diagnostic error code.Contents:0:21 Basic DTC analysis according to OBD2 protocol standard.1:48 Insight int...Music has long been shown to boost both cognitive performance and productivity. These are the most popular songs to code to. Music has long been shown to boost both cognitive perfo...Duramax / Allison Brownstone Metallic Member #780 of the 3500 Dually Club. Save Share. Like. T. TripleTow · Registered. Joined Jul 16, 2015 · 2 Posts #22 · Jul 16, 2015. Only show this user. I have a 2012 that just displayed the P205B code. There is 52K on the truck. The dealership said it is one of two things 1) ...Code P205b & P2202 fault codes/check engine. Hello all I'm new here on forum my names Alfred and I'm from southern Ca Ventura county. I own a 2011 Silverado 3500 hd dually and just spent thousands on a catastrophic fuel failure in which I replaced fuel pump lines and injectors the truck sat for almost a year as I had to save to fix.Since the code P249D indicates less DEF injection to the engine, it probably has something to do with the engine’s DEF injection. However, there’s more to it. Let’s see a few other causes of this issue. The leaking of exhaust. The fuel is too contaminated for proper use by the engine. The malfunctioning of the DPF (Diesel Particulate Filter).2017 Silverado 3500 WT L5P - 254k. Replaced DEF pump for recurring P205B and P205C codes. Added 5 gallons of DEF, and replaced controller to pump harness. Getting code P203C for reductant level sensor, can’t run any diagnostic tests on Gretio due to not showing a level. Added a picture, it appears the level sensor is … A stored code P205B means that the powertrain control module (PCM) has detected an abnormal degree of voltage in the reductant tank temperature sensor circuit. This code is exhibited in vehicles with a clean burning diesel engine, exclusively. The trouble code P205B can be elucidated as Reductant Tank Temperature Sensor Circuit Range/Performance Issue. This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made from 1996 up to present. It’s also more common among Audi, Citroen, Chevrolet, Ford, Hyundai, …Labor: 1.0. The cost to diagnose the P10D0 GMC code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most …

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The ECM inhibits the reductant system when DTC P1048, P1049, P2048, or P2049 is set. The ECM commands the engine to operate in Reduced Engine Power mode. The driver information center may display the Engine Power Is Reduced message. DTCs P1048, P1049, P2047, P2048, and P2049 are Type B DTCs.Step 1: Ensure That You’re In A Safe Environment. When dealing with a forced induction system like the one on your Duramax, you need to be aware of the insane amount of heat the engine could generate. Hence, make sure to work when the engine is cool. Then simply try to locate the boost control solenoid.Mar 31, 2022 · Duramax Code U029E Issues. I have been following this forum for a while and I enjoy reading all the information, now it is my turn with issues I guess. Very long post but I tried to cover it all. I have a 2017 Chevy Silverado 2500 HD LTZ with the 6.6 in it. Truck has 80k miles and all stock. 63 posts · Joined 2020. #2 · Jul 23, 2020. triplenet said: Hey all. New here so sorry if its not in the right area. I've got a 2016 single rear wheel 3500 that is throwing code P205B "reductant tank temperature sensor circuit range/performance". Looking around the web this seems to be a fairly common issue possibly covered by an extended ...P205B code - beyond extended warranty. I’m getting a recurring CEL and P205B code for DEF tank temperature sensor circuit range/performance. I’m able to clear the codes (BlueDriver) and have had no issues with performance but have seen on other forum posts that this can eventually lead to limp mode. I haven’t received the code on …My batteries are 4 years old so I start there. I install two new batteries and still nothing. A friend and I run codes and find the p0513. With this I realize its got to go to GM. Get to the dealership at 1:30 and at 5:45 they finally let me know they cannot relearn the Theft module.The P205B code in your Duramax indicates a problem with the temperature sensors in the reductant tank. It can cause lower performance, black smoke, and fuel economy issues. Learn the causes, symptoms, and solutions for this severe code from MotorAudit.com.Saturday morning started truck , guess what p205b code and cel again..I asked them not to just clear cel because I did that 5 times before I brought it to them. Guess I expect to much ... 2013 Chevy Duramax 6.6, 2500 Silverado, Crew Cab with Towing Package 4x4 Nexus 6P w/ TorquePro App and BAFX OBD2 Bluetooth AdapterSep 12, 2019 · 2221 posts · Joined 2016. #2 · Sep 13, 2019 (Edited) P204b DTC Description: Reductant Pressure Sensor Circuit Range/Performance. P205b Reductant tank temp sensor. P205b which I believe is similar/related and GM ended up replacing my entire DEF/heater/tank and module. This is for 2011-2012 This special coverage covers the condition for a ...

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Save up to 50% with Vitacost Promo Code. 43 Vitacost Coupons verified today! PCWorld’s coupon section is created with close supervision and involvement from the PCWorld deals team ...Feb 25, 2024 · P1050 code def level sensor 19. Can't find any for sure info anywhere on 2019 duramax Def level sensor. Is it built into the pump? Or is it a separate assemble, when I look up the part numbers it just shows the pump and the module, but there's something else plugged into the center of the def tank. I can't see the part number on whatever is in ... The DTC P0678 code means the Glow Plug located in the Cylinder 8 of the engine is either damaged or malfunctioning. When this Glow plug does not work properly, the engine fails to ignite due to a lack of initial heating. Breaking down the DTC P0678 gives the elongated version of the issue address.Postmates is known for food delivery but it's dedicated to delivering anything to anyone. Here's what you need to know, plus a coupon code. We may be compensated when you click on ...P22FB DTC description is NOx Sensor 1 Performance - Sensing Element. Our electrical engineering team is in the process of extracting info from data logs captured by a group of test pilots in the field. The Duramax L5P has 2 NOx sensors in the exhaust stream. NOx sensor 1 is located right after the turbocharger.The ECM inhibits the reductant system when DTC P1048, P1049, P2048, or P2049 is set. The ECM commands the engine to operate in Reduced Engine Power mode. The driver information center may display the Engine Power Is Reduced message. DTCs P1048, P1049, P2047, P2048, and P2049 are Type B DTCs.1 23379346 (S) Reservoir Kit. 1 19286292 Fluid. Found an internal fault in the DEF reservoir performed a diag. system check and found that the check engine light was present. Found that the ECM had 1 DTC stored, P205B for the DEF Temp sensor. Performed wiring and component checks to find an internal fault in the DEF reservoir.Feb 26, 2021 · It was about 10-12 degrees F when message popped up. I have a 2018 Z71 diesel w about 55,000 miles. Dealer found P20BE code Reductant Heater blah blah. Even though it's part of the emissions system that part is not a covered under 70,000 mi emissions warranty. Ugh. $697. to fix. To recap, code P0101 indicates a malfunction in the Mass Air Flow (MAF) sensor or circuit. The ECM of the Duramax calculates the MAF value. When it detects that the frequency signal from the MAF sensor is outside of the expected range, it stores the code. Let’s go over the code in more detail, so you get a clearer idea of how the code appears ... There appear to be at least 2 different causes for P205B faults, the QJ only addresses the P205B faults caused by liquid ingress into the electrical box of the UQLS sensor. Liquid ingress into the electrical box can also cause P205C and P206C codes, so the QJ fix will likely result in a reduction of those codes as well. Nov 19, 2015 · 45 posts · Joined 2015. #1 · Nov 19, 2015. Hello, I'm a noob here. I just bought a 2012 LML and within 2 weeks owning the 58k mile truck, I got the P205b code. Made a appt with chevy dealer who said it was under warranty. That evening the dealer called and said they wouldnt cover it cause it failed their DEF test. ….

Update Your Marketing and Read The Conversion Code: Stop Chasing Leads and Start Attracting Clients by Chris Smith. A condensed sales and marketing system that any small business c...2011 duramax engine code P205B, code P205B have reset it 1 time, 2500 HD, will try to fix it myself since GM wont take - Answered by a verified GMC Mechanic. We use cookies to give you the best possible experience on our website.Looking for what “business casual” actually means? Find out more in our quick guide to the business casual dress code. Human Resources | What is WRITTEN BY: Charlette Beasley Publi...P205b code. Jump to Latest Follow 21 - 30 of 30 Posts. 1 2. 187058 · Registered. Joined Oct 13, 2013 · 168 Posts #21 · Dec 17, 2015. Only show this user. Here's a video of a non-dealer ... 2013 Chevy Duramax 6.6, 2500 Silverado, Crew Cab with Towing Package 4x4This is a “how to” on diagnosing and repairing a P2033 and a P2032 EGT SENSOR 2 circuit codes. I will show you where the sensor is located, how to ohm it out...=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====nonda Auto DIY Center is the biggest ...Jul 14, 2022 · i Have a 2012 Chevrolet Silverado 2500 Duramax and I have a p205b code and this is the second time within a year this has come on the first time the dealership checked to see if air had gotten trapped in the tank and reset the system that was about 6 months ago does anyone know if their was a recall involving this issue thanks for any info on ... I have a 2014 chevy 2500hd 6.6L duramax. It has a check engine light on, codes are P205B reductant temperature sensor performance, P11CB NOx sensor 1 performance signal high, P003A turbo vane position … read moreYou might think that postal codes are primarily for sending letters and packages, and that’s certainly one important application. However, even if you aren’t mailing anything, you ...From what we know, one Duramax engine was developed but was never put into production. Developed entirely in-house by GM and assigned RPO Code LMK, the engine displaced 4.5 liters from a V8 layout ... P205b code duramax, 2221 posts · Joined 2016. #2 · Sep 13, 2019 (Edited) P204b DTC Description: Reductant Pressure Sensor Circuit Range/Performance. P205b Reductant tank temp sensor. P205b which I believe is similar/related and GM ended up replacing my entire DEF/heater/tank and module. This is for 2011-2012 This special coverage covers the …, 2016 LML GMC 2500. 6.6L: Code P01F0: coolant temp dropped below diagnostic monitoring temperature. Replaced Engine Coolant Temp sensor and cleared the code. Check engine light came back after sitting over night and warmed up before heading to work. I think I have it narrowed down to possibly bad thermostats allowing coolant to …, P205b code. Jump to Latest Follow 21 - 30 of 30 Posts. 1 2. 187058 · Registered. Joined Oct 13, 2013 · 168 Posts #21 · Dec 17, 2015. Only show this user. Here's a video of a non-dealer ... 2013 Chevy Duramax 6.6, 2500 Silverado, Crew Cab with Towing Package 4x4, Step 1: Obtaining Freeze Frame Data. First, connect an OBD-II scanner to your truck’s electric module port. The connecting port location varies for different models of trucks. It is mainly found under the dash beside the pedals. , P20B9 Duramax - Full Repair of DEF Heater - YouTube, Looking to get some insight, P1050 code on 2017 Duramax. Jump to Latest Follow 6K views 4 replies 3 participants last post by 17DenaliHD3500 Nov 8, 2023, Step 3: Inspect The Reduction Tank Heater Control Module. Sometimes a fault or defect in the control module of the tank triggers the P21DD. Due to the lack of signal sent from the sensor to the Power Control Module, it happens. This control module is located just above the heater tank. You need to remove three Allen bolts., 11 LML P140A code and delete questions. Hey guys, so I just got the CEL and got code P140A. The little that I can find about it is that it's a EGR cooler bypass valve problem. It seems it's at least a couple grand for the fix, as the trans needs to be removed or the cab needs lifted for access., The diagnostic codes that are required by law on all OBD II systems are standardized and all vehicle manufacturers use the same common code list. This means the misfire code P0300 represents the same failure on a GM/GMC Duramax, Ford Powerstroke, or Dodge Cummins. OBD-II Check Engine Light Trouble Codes for the GM/GMC Duramax below:, P205b code I started my truck today and the engine light came on about two miles into trip to get fuel. ... I have a 2015 Chevy 2500hd with a duramax diesel and have a p205b code I’ve reset it a couple times and driven a cycle to clear the code and keeps coming back is it ok to drive til I can get it checked out., Reductant heater replacement. There are other helpful videos such as https://www.youtube.com/watch?v=pXSSbrZyrLc&t=433s and I feel that if you watch both vid..., Nov 19, 2015 · 45 posts · Joined 2015. #1 · Nov 19, 2015. Hello, I'm a noob here. I just bought a 2012 LML and within 2 weeks owning the 58k mile truck, I got the P205b code. Made a appt with chevy dealer who said it was under warranty. That evening the dealer called and said they wouldnt cover it cause it failed their DEF test. , The founder of Girls Who Code shared how a loss led her to be brave enough to found an organization that is now 40,000 girls strong....ADBE Girls Who Code's founder didn't even kno..., The Reductant Temperature Sensor tells the engine computer (PCM) the temperature of the DEF in the tank. If the PCM detects an implausible signal from the Reductant Temperature Sensor, code P205B is set. Driving with this trouble code is not recommended. A vehicle with this code should be taken in to a repair shop for diagnosis., The P205B code in your Duramax indicates a problem with the temperature sensors in the reductant tank. It can cause lower performance, black smoke, and fuel economy issues. Learn the causes, symptoms, and solutions for this severe code from MotorAudit.com., Diagnostic trouble code (DTC) P20B9 stands for “Reductant Heater “A” Control Circuit/Open.”. This code sets when the reductant heater doesn’t perform as expected. The P20B9 engine code can also be triggered if the powertrain control module (PCM) doesn’t detect voltage in the reductant heater A’s control circuit., Step-3: Repair the glow plug timer or module. A faulty glow plug timer controller or module can cause the code p0381 to be set. So, check if there is any bad glow plug timer controller. If you find something like that, replace the bad one. Nonetheless, the code is still appearing, try the next step to remove the code from your Duramax., Drain Discussion starter. 45 posts · Joined 2007. #1 · Oct 13, 2021. So I have not updated my profile so I will lead with my pickup is a 2015 Duramax 3500 4wd (I believe its an LML not positive), I started getting the code P01F0 last spring and after driving with the code for a bit I reset the code with a code reader, apparently the weather ..., Sep 12, 2019 · 2221 posts · Joined 2016. #2 · Sep 13, 2019 (Edited) P204b DTC Description: Reductant Pressure Sensor Circuit Range/Performance. P205b Reductant tank temp sensor. P205b which I believe is similar/related and GM ended up replacing my entire DEF/heater/tank and module. This is for 2011-2012 This special coverage covers the condition for a ... , From what we know, one Duramax engine was developed but was never put into production. Developed entirely in-house by GM and assigned RPO Code LMK, the engine displaced 4.5 liters from a V8 layout ..., 2011 GMC 3500 Duramax, getting code P204B, Reductant system, Performance Bani 1. Recently i was getting code P205B, so I changed the def temp sensor and def heater. Cleared the code and drove for a we …, Looking for what “business casual” actually means? Find out more in our quick guide to the business casual dress code. Human Resources | What is WRITTEN BY: Charlette Beasley Publi..., Sep 12, 2019 · 2221 posts · Joined 2016. #2 · Sep 13, 2019 (Edited) P204b DTC Description: Reductant Pressure Sensor Circuit Range/Performance. P205b Reductant tank temp sensor. P205b which I believe is similar/related and GM ended up replacing my entire DEF/heater/tank and module. This is for 2011-2012 This special coverage covers the condition for a ... , Apr 28, 2022 · Replacing the reductant tank heater sending unit on a 2015 chevy silverado 6.6 turbo diesel duramax diesel in real time , See full list on vehiclehelp.com , 2221 posts · Joined 2016. #2 · Sep 13, 2019 (Edited) P204b DTC Description: Reductant Pressure Sensor Circuit Range/Performance. P205b Reductant tank temp sensor. P205b which I believe is similar/related and GM ended up replacing my entire DEF/heater/tank and module. This is for 2011-2012 This special coverage covers the …, 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. 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 to boost his performance in his tow rig to get up those hills a little …, 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. 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 to boost his performance in his tow rig to get up those hills a little …, Saturday morning started truck , guess what p205b code and cel again..I asked them not to just clear cel because I did that 5 times before I brought it to them. Guess I expect to much ... 2013 Chevy Duramax 6.6, 2500 Silverado, Crew Cab with Towing Package 4x4 Nexus 6P w/ TorquePro App and BAFX OBD2 Bluetooth Adapter, Mar 15, 2010 · DTC P0381. Wait To Start Lamp Control Circuit. Circuit/System Description. Ignition voltage is supplied directly to the wait to start indicator. The engine control module (ECM) controls the lamp by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the component ... , This document provides information on diesel exhaust fluid (DEF) and the diesel particulate filter (DPF) for 2014 Chevrolet Silverado and GMC Sierra vehicles equipped with a 6.6L Duramax diesel engine. It explains the warning messages, the service procedures, and the diagnostic instructions related to these systems. It also includes some frequently asked …, GMC 2011 3500HD Duramax DEF light on followed by engine check light, Fault codes P2047, P208A, P204C, P205D, U010E. all can be cleared and return at start up. Have removed DEF tank, cleaned system with water, checked wire harness continuity OK, New tank heater, New DEF injector to exhaust, New DEF fluid. , Is it a coincidence that I got a P205B code after changing passenger side ... and DEF systems going bad (2011-2016) being that a P205B I'm betting it's your DEF tank gone kablooey Reductant Tank Temperature Sensor Circuit ... A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the ...