Search results
-
A
Strange P0420 issue with 2017 Tahoe 5.3
My girlfriend recently had a new piece of exhaust pipe welded in after the cat, after discovering a hole in the factory pipe. About a week later, she's getting a P0420 code. Truck has about 120k on it. According to the torque pro graphs, the cat would look to me as it's mostly doing its job...- abefroman
- Thread
- Replies: 2
- Forum: Engine & Drivetrain
