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Discussion Starter #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.
 

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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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Discussion Starter #4
Yea, i have a 1998 supra na-t. Im very confused on my problem it just shows up p0125 code. Its very frustrating i dont know what to do..
 

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champazn said:
I think its more then a 02 sensor bro did u read my thread from sf?
Insufficient Coolant Temperature for Closed Loop Fuel Control..... as odd as it may sound, that could very likely be triggered by a failed O2 sensor
 

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If you have access to a scanner... Check the voltage reading on your bank 1 and 2 sensor 1. The sensors should be reading greater to 0.01 volts.
JP Importz
 
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