Oct 16, 2022 · Here's how I solved my P20EE and P249D codes that have been plaguing me for months. Truck has 185K and I got it not quite a year ago somewhere in the 17xK range. It has drank …

Jun 23, 2025 · After 5 years and 48,873 miles of mostly heavy towing, our 2020 EcoDiesel triggered its first code. Since clearing the code, we've driven (towed) 100 miles without any more issues. I'm not …

Oct 14, 2022 · 2018 duramax p20EE i keep getting this code the dealer says i need a new catalytic converter at $1500. I can run the truck in town and get the code in about 2 days. but if i am pulling …

Dec 9, 2019 · Well, had this code greet me today, P20EE. I have a 2015 with 68,000 miles. Is this the beginning of the end with this code?

Jul 28, 2019 · This morning just had code P20EE pop up after using my Exhaust Brake feature for the first time on my new 2021 Chevy Silverado 2500HD Duramax with a little over 12,000 miles.

Mar 30, 2016 · Hello fella's I just bought a 2014 2500 with a 6.7 and 26400 miles on it . Driving the other night it kicked the p20ee code out. I took it to the dealership and they called me today and said they …

Jul 11, 2017 · New truck, already been in the shop @ 1800 miles for a bad injector. 2 weeks ago, 2900 miles, popped up a P20EE. Cleared the code. Week later code came back. Took to dealer. Day 5. …

Jun 12, 2017 · My 2013 2500HD with LML popped up with P20EE last night while we were running errands. We leave for vacation in about a week or so pulling a 35' 5th wheel to Colorado from …

Feb 14, 2025 · Dreaded P20EE Code Jump to Latest 1.9K views 16 replies 9 participants last post by Kazimodo Apr 15, 2025 O

May 29, 2020 · Last friday night I got the Check engine light with the P20EE code. got the truck in on Sat and the shop diagnosed it as contaminated DEF. The result was a new CAT which was only 3.5 yrs …