i have a chevy 350 1 ton year 2000 and the cat sensor won't reset when driving between 40 and 45 for long over 5 miles continuesly the smog guy says he doesn't see any bad numbers its only the catsens

Asked by May 14, 2018 at 05:10 PM about the Chevrolet C/K 3500

Question type: General

the truck runs fine i just need to get it smoked any ideas

2 Answers

12,940

Those cats need to get really hot to reach testing temperatures.

172,855

Maybe you need to replace the O2 sensor or complete a drive cycle. Look up how to do a drive cycle.

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