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Discussion Starter · #1 ·
Hi,
I am a new user to this site. I recently changed a coil pack due to a faulty one, which fixed my misfire issue, however, after driving for an hour the check engine light came on and I checked the code which resulted in a P0128 code, any corralation between the repair job on the coil pack and a thermostat issue?
 

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2003 gmc envoy_slt
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:tiphat Welcome :tiphat IMHO it is a coincidence. What does the temp gauge read. If it is under about 210, it is probably running cold. You will need a new t-stat.:m2:
 
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