Nov 13, 2023 · Hi guys. I'm new to this blog and Duramax in general. I just bought a 2024 3500HD and about 500 miles after driving it off the lot I got the CEL. My scanner shows code P0422--Catalyst 2 …

Aug 27, 2023 · P1050 and P0422 2017 Jump to Latest 2.6K views 5 replies 2 participants last post by jchuckabee Aug 27, 2023 J

Oct 12, 2023 · Well, had way too many problems over the last month. now another. Pulling our 5th wheel back to Alabama from amarillo and check engine light back on. Get alert that DEF is getting …

May 10, 2023 · New Chevy ZR2 Silverado 2500. Check engine light and kicking two codes. C0616 and P0422. Only has 350 miles on the new truck. Emissions system issue. Took to dealer for review.

Mar 26, 2008 · "P0422 - Main TWC efficiency Bnk1 below thresh" All codes were cleared, then after approx 57 mi the code appeared. We're a little stumped and going clear it, see if & when it comes …

Feb 16, 2025 · I have a 2024 Silverado CH with 19000 miles. I had it parked for 3 days in Mammoth CA with temps around 23 degrees. Then I started heading to Bozman Montanna. After 100 miles in my …

Nov 6, 2023 · So bought a 2020 3500 LTZ dually last week, received it Saturday the dealer I got it from replaced tires and re painted the hood. On our way home check engine light came on, Ran codes …

Mar 31, 2024 · I got P0422 at 1600 miles (last week). Covered by bulletin 24-NA-058 (reprograms ECM with updated firmware). Sucks it happens so quick with a new vehicle but I guess the perimeters …

Oct 20, 2008 · Hello all, I am a college student fresh to these forums as I just last month bought a 1996 Volvo 850 Turbo. It has 146k on it, and runs great, except for last week when the CEL came on. So I …

Jan 23, 2010 · (TDFDiesel) Edit: Here is a free resource shared by a member. It appears to offer DTC codes by manufacturer with further documentation for Troubleshooting. My initial reviews looked like …