P11cb code duramax

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Nov 12, 2022 · By B R Oniango / November 12, 2022. The P11DB diagnostic trouble code is set when there is a problem with the nitrogen oxide (NOx) sensor. It indicates an issue with the NOx sensor current performance bank 1 sensor 1 in Chevrolet or GMC diesel vehicles. The possible causes of the P11DB code include a faulty NOx sensor, an open or shorted wiring ... So much has changed about the way people make calls. For example, you can’t even call your next door neighbor’s landline without using an area code, and you certainly can’t call mobile phones without it. Area codes also give you a good idea...Then nearing the end the power seemed worse but made it home. After I got home I found P140C, P11CB (Faulty Nox Sensor 1) and P2599 (Turbocharger Boost Control Position Performance - High Position). ... Oh, one other thing I find it suspicious that the power is down and code P2599 was set. If I had to take a wild-xxx guess some sort of …GMC OBD Codes P11CB and P22FA. I have a 2013 GMC HD2500 with 16,800 miles. The check engine light came on and scan tool showed codes above. I made sure fuel cap was tight and reset light. It came back on after reaching operating temperature.check engine light codes for 2013 GMC 2500 diesel- P140C and P11CB This problem has been going on off and on for a - GMC Cars & Trucks question ... Where is the downstream NOX sensor located on a 2013 Silverado HD 2500 with the 6.6 Duramax Diesel. ... Chevy 2500hd 2016 6 6 lol code p11cb. Read full answer. Jun 22, 2017 • Cars …Save. Ramblinrodney · #8 · Mar 6, 2015 (Edited) Found this. 2013 gmc, 16,370 miles, cel on with P21dd code and is currently at dealership for def heater element replacement. Vehicle has been there since April 1st and waiting for part to show up the week of the 14th from gm.The 21500 Truck Edition performance module fits 2015-2016 6.6L GM Duramax trucks (LML engines). The Truck Edition module is designed for towing and fuel econ...New shop replaced transmission control module, seemed to fix all issues for a few months. 11/13/2020 - Check engine light, code P11CB, sensor 1 high voltage, replaced and performed computer relearn (2nd time replacing sensor 1, got warranty check from my old dealership since it failed within 6 months of their installation). 10/12/2021 - …

This will fix check engine light code P11DBACDelco 12671387 GM Original... https://www.amazon.co... Replacement of nitrogen oxide sensor bank 1 upstream sensor. This will fix check engine light ...A P0675 code may be identified first by scanning the vehicle's onboard computer with an OBD-II code reader. Check in and around engine cylinder 5 for any signs of damage or abnormality. Inspect the glow plug itself thoroughly, with particular focus being given to the relay, timer and module components. A glow plug can be tested by removing it ...P0420 Catalyst System Low Efficiency. Similar to P24A0 Diagnosis. This code commonly sets due to a Hydrocarbon Injector failure. Check EGT sensors first, see P24A0. 1) Perform the regeneration and note the exhaust temperature sensor #2 to be over 1000 degrees with temperature sensor #1 more than 600 degrees.I have no active codes, but do have a pending P11CB code. Appears this code is telling me that I have a potential/pending bank 1 NOX sensor issue. ... 2010 Gmc 2500 Duramax 853,500 Odometer miles - …Jan 30, 2013 · 6.5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004.5-2005 (LLY) Closed / Archived Marketplace Ads 6.2L Diesel Engine Top Contributors this Month View All

Jun 5, 2019 · P11DC - NOx Sensor Current Performance Bank 1 Sensor 2Possible Causes Are:1) Faulty NOx Sensor2) NOx Sensor harness open or shorted3) NOx Sensor circuit bad ... Jun 22, 2017 · 85,242 Answers. P140C OBD Code Definition: Exhaust Gas Recirculation Control Circuit B- I would check the EGR valve position sensor. P11CB Nox Sensor 1 performance signal high, this fault code is related to the EGR valve as well, when the EGR system malfunctions it raises the NOX levels in the exhaust. Posted on Jun 22, 2017. Labor: 1.0. The cost to diagnose the P11DB 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 auto repair shops charge between $75 and $150 per hour. Search for P11DB GMC Questions and Answers: Search here →. This exhaust gas mixes with the intake air and cools the combustion process. The recirculated exhaust gas also prevents the formation of nitrogen oxides (NOx). The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the actual EGR flow is lower than a calibrated value for greater than 5 s. P140C Code - Exhaust Gas …DTC P0420 is a type B DTC. Diagnostic Aids. The use of Off Road Red Dye Fuel or continuing use of non ultra low sulfur fuel may be a possible contributor to this DOC failure. If EGT sensor 1, before the DPF, is slow to respond to exhaust gas temperature changes, or sticks in range, this DTC may set.P0088 trouble code definition. P0088 is Fuel Rail/System Pressure - Too High, indicating a fuel delivery system issue. This code is similar to P0087. P0088 may also be seen with codes that case misfires, lean, and rich conditions. What the P0088 code means. P0088 is a OBD2 trouble code that tells us there is high fuel pressure found in the fuel ...

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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 ...2003 2500hd duramax 6.6 turbo diesel crewcab 8ft box 4x4. 2014 sierra 2500hd duramax 6.6 turbo diesel 4x4 ... burning the soot (particulates) from the filter. Running out of DEF is definitely not good, but not why you have this code. Some trucks have extended coverage, I suggest taking to a dealer to find out. 2011 Silverado 1500 …Aug 11, 2020 · Thank you for holding Mark, The code P11CB on your 2015 Duramax usually sets in most cases due to a failing (NOx) sensor 1 and if you just looking to replace it without testing it to be sure it has, in fact, failed then all you would need to do is replace it and clear the code and that should do it as long as it was just a bad sensor which is likely. This is a service bulletin for 2014 Chevrolet Silverado and GMC Sierra trucks equipped with 6.6L diesel engines. It provides diagnostic and repair instructions for the exhaust temperature sensor and the reductant injector. It also includes a list of DTCs related to the emission reduction system and the NOx sensor.P0420 and P11CB. To me, sounds like my truck needs weight reduction procedure. Would that ‘fix’ the P11CB nox sensor? What is the purpose of the nox sensor? Background: 2016 LML 3500, first duramax and I always try DIY before dropping big bucks at a dealer.

date code of the other nitrogen oxide sensor to determine if it requires replacement. The date code (1) is located on the back side of the NOx sensor module. The first six digits of the code represent the date code. Refer to the photograph. The example in the photograph has a date code of 131103xxxx, which indicates a November 03, 2013 date code.P2510 code | Chevy and GMC Duramax Diesel Forum. We may earn a commission for products purchased through links on this page. Forums. Chevy / GMC Duramax 06-07 LBZ & LLY Forums. 06-07 LBZ & LLY Duramax Powertrain. How do I fix this code? Thank you very much in advance for any help.Code P11CB GMC Description. The Powertrain Control Module monitors the Nox Sensor 1. The PCM sets the OBDII code when the Nox Sensor 1 is not to factory …P2599&P2263 Engine power reduced. My issue has been going on about a year. All started with all of the DEF codes and the 2599 and 2263. After three trips to the dealer and replacing the tank, heater, injector GM finally fixed the DEF system. On my last trip pulling about 12K 5er and ATV behind the trailer.Chevrolet Repair P11cb code. 2013 3500 6.6 duramax 62000 miles Faulty Nox Sensor 1 Nox Sensor 1 harness is open or shorted Nox Sensor 1 circuit poor electrical connection Intake System Leaks Exhaust System Leaks 1. Ignition ON, observe the DTC information with a scan tool. DTC UXXXX should not be set. If a DTC is setP11DC code. Hey all- New to me 2019, 3500 L5P - 40k miles - I,ve only put about 170 miles on truck since I bought it a few weeks back. The other day I was getting on the highway entrance ramp & engine seemed like it stumbled a little & I see the check engine light set. I was close to AZ so they check code -P11dc, # 2 position nox sensor.4,602 satisfied customers. 2015 Duramax 6.6, getting 2 codes for the EGR bypass valve. 2015 Duramax 6.6, getting 2 codes for the EGR bypass valve. Looking for diag & repair info for these two codes. P2493 & P24C4, also have a P0101 … read more.Alright so a few months back I kept getting a P0045 code. P0045 T/S Charger Boost Ctrl Solenoid Circ/Open. This is my first diesel and turbo charged vehicle and was still learning how it all worked. Many of the other threads spoke of such issue but all listed that it was one of the following issues: Vane Positon Sensor.My 2015 Chevy 3500 duramax has p262b code up how do I fix it. 3500. The truck will just shut off while driving sometimes - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website.

Nov 20, 2012 · Emission Control System Warranty - . 6.6L Duramax Diesel Engines are covered for the first 5 years or 50,000 miles, whichever. comes first. ‐ Specified components for the emission control system are covered for the first 7 years or 70,000 miles, whichever comes first.

85,242 Answers. P140C OBD Code Definition: Exhaust Gas Recirculation Control Circuit B- I would check the EGR valve position sensor. P11CB Nox Sensor 1 performance signal high, this fault code is related to the EGR valve as well, when the EGR system malfunctions it raises the NOX levels in the exhaust. Posted on Jun 22, 2017.My 2012 Duramax has two trouble codes P11CB and P0101, I haven't noticed any problems with performance or starting. I have installed a fresh air intake a few months ago, what are these codes for? Vehicle: 2012 Chev 2500 Duramax. p11cb.2016 lml, 55k miles, truck runs and drives fine- no limp mode or reduced power. Possible the solenoid that actuates the turbo veins is sticking causing too much boost at certain rpm’s?Save. joebedford · #15 · Nov 3, 2015. The repair procedure for the nox sensor says that if one is bad they must check the other one for its date code. I forget the exact date but anything before sometime in 2012 must be replaced even if it doesn't report bad. Just replaced both on my 2011 3500HD Dually 4x4 LB LTZ.Jul 22, 2017 · 28. Berryton, KS. Jul 22, 2017. #2. 98089571 full dealer price $273.66. NO doubt you can find it for much less. Glow Plug Control Module Programming and Setup. The following service procedures require either a programming or a setup event performed for a complete repair. GPCM Replacement. Thank you for holding Mark, The code P11CB on your 2015 Duramax usually sets in most cases due to a failing (NOx) sensor 1 and if you just looking to …1 - 3 of 3 Posts. jc1843 Lifetime Premium · #2 · Dec 8, 2015. That is a NOX sensor code-- should be covered under warranty-- before you delete it-! Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam ...

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This is a service bulletin for 2014 Chevrolet Silverado and GMC Sierra trucks equipped with 6.6L diesel engines. It provides diagnostic and repair instructions for the exhaust temperature sensor and the reductant injector. It also includes a list of DTCs related to the emission reduction system and the NOx sensor.05 3500 ccdrw lly, complete lbz banks ram-air intake set-up with with super scoope, egr deleted profab intake elbow , diamond eye 4' duals , diamond eye down pipe and no kitty efi by full throttle customs , edge insight cts for gauges ,lbz mp. and fuildamper .pcv reroute,right and left side boost tubes, banks techi cooler ppe ported fitting , afe rear …Jan 11, 2023 · 2010 Gmc 2500 Duramax 853,500 Odometer miles - sold Nov 2018 2013 LT CCSB SRW bought with 508,000 miles, now over 703,000 miles 2013 CrewCab and chassis with 9' Hillsboro aluminum flatbed 84,000 miles. Go to Duramax r/Duramax • Posted by ... r/Duramax • p11cb codes on a 2015. r/Duramax ...DTC P0420 is a type B DTC. Diagnostic Aids. The use of Off Road Red Dye Fuel or continuing use of non ultra low sulfur fuel may be a possible contributor to this DOC failure. If EGT sensor 1, before the DPF, is slow to respond to exhaust gas temperature changes, or sticks in range, this DTC may set.05 3500 ccdrw lly, complete lbz banks ram-air intake set-up with with super scoope, egr deleted profab intake elbow , diamond eye 4' duals , diamond eye down pipe and no kitty efi by full throttle customs , edge insight cts for gauges ,lbz mp. and fuildamper .pcv reroute,right and left side boost tubes, banks techi cooler ppe ported fitting , afe rear …P11CB Duramax Bilin Technician Nevada Posted 3 years ago Latest 3 years ago Question Resolved Emissions 2013 Chevrolet Silverado 3500 HD LT 6.6L (8 LML) 6-spd (1000) P11CBcode duramax p003a, p2563 code duramax, p20ee code duramax, p01f0 code duramax, p11cb code duramax, p21dd code duramax, p0700 code duramax, u0101 code duramax, p205b code duramax, p2463 code duramax, duramax code reader, duramax code p0087, duramax code p21dd, duramax code p0128, duramax code p0700, …Labor: 1.0. The cost to diagnose the P11DB 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 auto repair shops charge between $75 and $150 per hour. Search for P11DB GMC Questions and Answers: Search here →.Common problems with Duramax diesel engines include air in the fuel lines, fuel starvation, water pump failure, overheating, injector failure and harness chafing. Some of these issues are preventable with certain modifications.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 questions and answers about DEF and DPF.- 2020 - CRC - 10/26/20 Page 2 October, 2020 Bulletin No.: 20-NA-195 Cause 5651968 This condition may be caused by a damaged NOx2 sensor, as shown in the graphic ….

Ron, ASE Certified Technician. 46,559 Satisfied Customers. 35 years experience with ASE Certs. Ron is online now. Related Chevy Questions. 85000 miles, P11CB keeps randomly setting, NOx sensor 1 has been replace, EGR valve has been replace, been to dealer multiple time for this … read more.2003 2500hd duramax 6.6 turbo diesel crewcab 8ft box 4x4. 2014 sierra 2500hd duramax 6.6 turbo diesel 4x4 ... burning the soot (particulates) from the filter. Running out of DEF is definitely not good, but not why you have this code. Some trucks have extended coverage, I suggest taking to a dealer to find out. 2011 Silverado 1500 …I have a 2012 2500hd 6.6 duramax and I got a check engine light with codes p2200, p2201, p2202, p2203, p11cb, and a trailer brake service warning all at once. I also have a warning saying 43 miles unt … read more P0420 and P11CB. To me, sounds like my truck needs weight reduction procedure. ... Background: 2016 LML 3500, first duramax and I always try DIY before dropping big bucks at a dealer. ... of this year and replaced both with dorman ones and my readings were all over the place for them and giving me the same code sometimes. Returned them, put my ...P2202 2013 gmc 2500hd duramax. Sierra 2500hd. 77077. P11b4…. 17,887 Satisfied Customers. owner/mechanic at 3D Automotive. david craig is online now.A common problem with high-mileage 2001-2010 Duramax trucks is that the fuel filter head assembly begins to develop air leaks. The engine’s CP3 high-pressure fuel pump is capable of drawing fuel from the tank without the aid of an external lift pump as long as the system remains primed.Labor: 1.0. The cost to diagnose the P140C 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 auto repair shops charge between $75 and $150 per hour. Search for P140C GMC Questions and Answers: Search here →.Mar 5, 2015 · Save. Ramblinrodney · #8 · Mar 6, 2015 (Edited) Found this. 2013 gmc, 16,370 miles, cel on with P21dd code and is currently at dealership for def heater element replacement. Vehicle has been there since April 1st and waiting for part to show up the week of the 14th from gm. The 21500 Truck Edition performance module fits 2015-2016 6.6L GM Duramax trucks (LML engines). The Truck Edition module is designed for towing and fuel econ...1 - 3 of 3 Posts. jc1843 Lifetime Premium · #2 · Dec 8, 2015. That is a NOX sensor code-- should be covered under warranty-- before you delete it-! Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam ... P11cb code duramax, What Does the P11CB GMC Code Mean? The Powertrain Control Module monitors the Nox Sensor 1. The PCM sets the OBDII code when the Nox Sensor 1 is not to factory …, To fix the automobile fault code p11cc, follow these steps: 1. Check the possible causes mentioned above. 2. Visually inspect the wiring harness and connectors related to the fault code. 3. Look for any damaged components. 4. Check for broken, bent, pushed out, or corroded pins in the connectors., I am looking for P11cb help too. I have a 2015 Lml and I replaced nox sensor 1 and tested harness wiring and still code keeps coming back. When my buddy scanned it and watched live data it was showing the inductance was out of range. So I’m not sure if that means I should do a boost leak test., P0420 Catalyst System Low Efficiency. Similar to P24A0 Diagnosis. This code commonly sets due to a Hydrocarbon Injector failure. Check EGT sensors first, see P24A0. 1) Perform the regeneration and note the exhaust temperature sensor #2 to be over 1000 degrees with temperature sensor #1 more than 600 degrees., Feb 10, 2019 · UPDATE: Truck was throwing p2201 p2202 2203 p12b6 p2bad I replaced NOx sensor 1 with ACDelco 12671387 and all is well! NOx sensor 1 is under the hood on the turbo outlet. I also reset NOx sensor 1 on a Snap On scanner (Solus Ultra) with 17.4 software , Snap-On scanner software 17.2 and above can do it.... Hint: look under the engine menu. , Nov 11, 2014 · P11CB or P11CC. * DTCs P0101, P0234, P0299, P0401, P0402, P140B, P140C, P2228, or P2229 are not set. * The DPF Regeneration is not active. * The BARO is between 75-106 kPa (11-15 psi). * The ambient air temperature is between -7 to +38°C (19-100°F). * The engine run time is greater than 30 s. * The engine coolant temperature is between -7 to ... , The DTC is unique to the control module which is not communicating and one or more control modules may set the same exact code. A loss of serial data communications DTC does not represent a failure of the control modules that contain the stored code. Conditions for Running the DTC. The system voltage is between 9–16 V., 2015 Chevy 2500 HD 2015 Duramax. 85000 miles, P11CB keeps randomly setting, NOx sensor 1 has been replace, EGR valve has - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... 2015 duramax is showing a P11CB code, ..., Labor: 1.0. The cost to diagnose the P2599 Chevrolet 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 auto repair shops charge between $75 and $150 per hour., AE L12 Discussion starter · 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., DTC P0108: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage. DTC P0299: Turbocharger Engine Underboost. DTC P2263: Turbocharger Boost System Performance. This condition may be caused by intermittent conditions and poor connections in the MAP sensor connector wiring harness terminal crimps., The DTC is unique to the control module which is not communicating and one or more control modules may set the same exact code. A loss of serial data communications DTC does not represent a failure of the control modules that contain the stored code. Conditions for Running the DTC. The system voltage is between 9–16 V., I have a 2012 2500hd 6.6 duramax and I got a check engine light with codes p2200, p2201, p2202, p2203, p11cb, and a trailer brake service warning all at once. I also have a warning saying 43 miles unt …, I have a 2012 2500hd 6.6 duramax and I got a check engine light with codes p2200, p2201, p2202, p2203, p11cb, and a trailer brake service warning all at once. ... Took my code reader and got a P11CB. I replaced both the upstream sensor behind the turbo and the downstream sensor ..., GMC OBD Codes P11CB and P22FA. I have a 2013 GMC HD2500 with 16,800 miles. The check engine light came on and scan tool showed codes above. I made sure fuel cap was tight and reset light. It came back on after reaching operating temperature., P0420 Catalyst System Low Efficiency. Similar to P24A0 Diagnosis. This code commonly sets due to a Hydrocarbon Injector failure. Check EGT sensors first, see P24A0. 1) Perform the regeneration and note the exhaust temperature sensor #2 to be over 1000 degrees with temperature sensor #1 more than 600 degrees., While in the driveway today my CE light came on, I ran a scan and got the following codes: P154D. P16A8. P16AB. P11CB - nox sensor. P2510 - ECM relay circuit. P2610. I can't find what the others are. I reset the codes and drove the truck around for about 30 min and it never came on again., Labor: 1.0. The cost to diagnose the P11DC 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 auto repair shops charge between $75 and $150 per hour. Search for P11DC Questions and Answers: Search here →., Mar 12, 2012 · Perform the following steps when encountering a P2610. Turn the IGNITION OFF for 90 seconds. Unplug both the engine control module (ECM) connectors for 90 seconds. After 90 seconds has passed, re-install the ECM connectors. With the ignition on use the Tech2 and clear all codes in the ECM. , I've repaired numerous P0420 codes with a new 9th injector or indirect injector and a stationary regen after the replacement. I've replaced the indirect injector on 4 different LML trucks at around the 120,000 mile mark and it's repaired every one of them. Just did one on Tuesday., 17,890 Satisfied Customers. owner/mechanic at 3D Automotive. david craig is online now. Related Chevy Questions. 2015 Chevy 2500 HD 2015 Duramax. 85000 miles, P11CB keeps. 85000 miles, P11CB keeps randomly setting, NOx sensor 1 has been replace, EGR valve has been replace, been to dealer multiple time for this … read more., 2010 Gmc 2500 Duramax 853,500 Odometer miles - sold Nov 2018 2013 LT CCSB SRW bought with 508,000 miles, now over 703,000 miles 2013 CrewCab and chassis with 9' Hillsboro aluminum flatbed 84,000 miles., Feb 2, 2015 · 6.5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004.5-2005 (LLY) Closed / Archived Marketplace Ads 6.2L Diesel Engine Top Contributors this Month View All , 2010 GMC Sierra LMM Duramax. Exhaust and tuned. 05-06-2021 #7. putergod. View Profile ... (permanent) codes are below. Any general thoughts on using HP to diagnose & fix this? No interest in removing/defeating emissions system. P0101 - permanent P11CB - history mil NOX 11 611ppm NOX 12 149ppm 12-22-2022 #20. …, 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 questions and answers about DEF and DPF., Jul 30, 2020 · John C. December 13, 2020. The Chevy DuRamax code p140c is for exhaust gas recirculation slow response decreasing flow. The importance of the EGR valve cannot be understated. The exhaust gas recirculation (EGR) is an effective strategy to control NOx emissions from diesel engines. The EGR reduces NOx through lowering the oxygen concentration in ... , If you fix the P205B code issue, you will require several diagnostic tools to help you out. Some of the most important ones include a scanner, an ohmmeter, screwdrivers, and other power tools. Additionally, ensure extra components, including wires, that you will be required to change if the current ones are damaged., P0088 trouble code definition. P0088 is Fuel Rail/System Pressure - Too High, indicating a fuel delivery system issue. This code is similar to P0087. P0088 may also be seen with codes that case misfires, lean, and rich conditions. What the P0088 code means. P0088 is a OBD2 trouble code that tells us there is high fuel pressure found in the fuel ..., Po420 code keeps coming on my 2013 duramax, Po420 yes keep erasing code but keeps coming back up, 2500hd, Yes I changed - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... i have P11CB i have P140C and P0101 ..., Jan 31, 2013 · I have a GMC duramax 2500HD and i have 3 different codes popping up at the same time, i was told it was probably just a fuel cap, and they are all most likely related, the codes are, P11CB, P24AO, P0420, does anyone know what this means. Reply. Save. MIkey52 · #29 · May 3, 2019. If it’s a diesel, it’s not your fuel cap. , What Does the P11CB GMC Code Mean? The Powertrain Control Module monitors the Nox Sensor 1. The PCM sets the OBDII code when the Nox Sensor 1 is not to factory specifications. P11CB GMC Code - Nox Sensor 1 Performance Signal High, This video is a run through of how to diagnose a bad nox sensor on an LML duramax, P0420 Catalyst System Low Efficiency. Similar to P24A0 Diagnosis. This code commonly sets due to a Hydrocarbon Injector failure. Check EGT sensors first, see P24A0. 1) Perform the regeneration and note the exhaust temperature sensor #2 to be over 1000 degrees with temperature sensor #1 more than 600 degrees.