Help Diagnose P0420 Code
#1
10-11-2010, 05:11 PM
Help Diagnose P0420 Code
2000 GMC Jimmy 4x4 - 150k miles
Just recently (last 60 days) I had an exhaust leak fixed... The Cat wasn't welded to the exhaust on the top so my mechanic properly welded it. Otherwise he said the cat was in great shape. About 7 days ago my SES light came on and I'm throwing a P0420 code. Any thoughts on diagnosing to ensure I fix the right thing?
Just recently (last 60 days) I had an exhaust leak fixed... The Cat wasn't welded to the exhaust on the top so my mechanic properly welded it. Otherwise he said the cat was in great shape. About 7 days ago my SES light came on and I'm throwing a P0420 code. Any thoughts on diagnosing to ensure I fix the right thing?
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