May 5, 2024 · P2A00 / HO2S troubleshooting h2os nox1 nox2 p2a00 Jump to Latest 11K views 11 replies 7 participants last post by mudmaker Dec 1, 2025

May 21, 2025 · 2018 2500 HD P2A00 and P026D fuel injector map sensor nox sensor p026d p2a00 Jump to Latest 1.3K views 2 replies 3 participants last post by duramaxdoctor_539 May 21, 2025

Apr 10, 2025 · I have a 2019 GMC Duramax with the L5P engine throwing a P2A00 code, NOx sensor which I have changed twice along with a new MAP sensor, all OEM. It’s been to 3 shops and still …

Sep 17, 2018 · Hey guys I have been dealing with a nightmare with my 2017 Silverado 2500 L5P since the first day I bought it. I purchased the vehicle with 29k miles and it was certified preowned. The day …

Jul 24, 2024 · P2A00 and P026D At the beginning of the trip my regens were about every 300 miles, and now they are about every 90 miles. I checked my Banks boost tubes and all the clamps are tight and …

Nov 26, 2019 · 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 …

Jun 24, 2020 · So after this new ECM program recall that I had a couple weeks ago I have had 3 codes pop up. Two of them I cleared last week and haven’t seen again and now this one. I called Chevy …

Dec 16, 2012 · If any combination of DTCs DTCs P0101, P0299, P0712, P11CC, P11DC, P2002, P2463, P2627, P2A00, P2459, P22B6, P200C, P200E, P0263, P0266, P0269, P0272, P0275, …

Aug 24, 2021 · Cleaned the MAP and replaced the NOX1 and did the re-learn (was also getting a P2A00 code). Got the P2A00 code resolved with the new NOX1, but still getting the P026D.

Oct 27, 2011 · P2A00 - O2 Sensor Bank 1 Sensor 1 I'll be damn honest with you - Bad Diesel fuel, or you have an Electrical Problem in the Emissions control sensors. @ 850 miles, you are at the end of …