My check engine light flashes on cold start up. Once warmed it stops. Just had a new O2 sensor put in. Could he have put the wrong type in?
Cars & Trucks - Chevrolet - Blazer - 1989 Chevrolet S-10 Blazer
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Answers & Comments
It's probably another sensor, you should get a diagnostic check to see which sensor is going off before you start replacing unneccesary parts