2001 pt cruiser downstream sensor if bad will it affect my co and runnig rich

Asked by Apr 02, 2014 at 02:40 PM about the 2001 Chrysler PT Cruiser Limited

Question type: Maintenance & Repair

can not pass smog test

1 Answer

72,435

No, the only purpose the downstream oxygen sensor serves is to monitor the catalytic converter. The upstream oxygen sensor regulates air/fuel mixture. HTH. - Jim

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