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Paul M ASE Master
Paul M ASE Master, ASE Master Tech
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Experience:  ASE Master Tech 20+ Years
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Have a 1998 Pontiac Gran Prix 3.

Resolved Question:

Have a 1998 Pontiac Gran Prix 3.8 with a p0125 code
Submitted: 5 years ago.
Category: Pontiac
Expert:  Paul M ASE Master replied 5 years ago.

Hello and thank you for using Just Answer

I'm Paul and I will help you with your Question


code p0125 is most often caused by a bad thermostat


I would replace the thermostat and clear the code


if it continues to happen you need to look at the coolant temp sensor


let me know if you need more help



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