SES Light, Codes, Emissions
I have a 99 blazer LT with 145,000. I bought it a few days ago. When I drove it home the SES light came on (awesome). I pulled the codes.
A total of 3 codes, all emissions related I believe. P0420 catalyst system below threshold bank 1 (this code came up twice) P0133 circut slow response bank 1 sensor 1 I've read the tech articles for these codes so I have a basic understanding of what it could be. The converter isn't making any noises. The truck does seem to have a very slight stutter or hesitation when at idle but it isn't very repetitive. I guess I'm asking you fellas where you think I should start? How do I know for a fact the o2 sensors are bad or the cat converter is bad? More importantly, what causes it? And how do I stop it from happening. There's a really good chevy dealer where I live, I may take it in and have them do an inspection/diagnosis on it. Thanks for your help. Mack |
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