How to tell if therostat is bad in a 2004 cavalier

Asked by jrodle Mar 29, 2015 at 05:28 AM about the 2004 Chevrolet Cavalier

Question type: Maintenance & Repair

1 Answer
1,545

TheGMGuy answered 9 years ago

Do you have a check engine light? If so, get an OBD2 scanner and read the code or codes. If you have code P0128, this is a good indication you have a bad thermostat.

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