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P0125 code!!

2K views 7 replies 6 participants last post by  JPI 
#1 ·
hey guys

I had this code for a while its the coolant temp. I heard it might be the thermostat but i changed that and checked the coolant sensor. It all seems fine?? any ideas what i should do next?? because the cel pops up after 5 mins of driving and stays on.
 
#2 ·
The title of that code is a little missleading. If your temp gauge on the dash shows normal operating temp when the CEL lights up, then it is a bad O2 sensor. It will be your bank 1 or 2 sensor 1. If you have any mods done (split second box, or anything else) you should speak up now, as they can change the diagnosis.
 
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