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cardoctor71, ASE Certified Technician
Category: Chevy
Satisfied Customers: 672
Experience:  MasterCertified ASE Technician With 35 years experience
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You 07 impala is showing Ac off Rhine over heat on the dash

Customer Question

You 07 impala is showing Ac off Rhine over heat on the dash and my fans are coming on but my car isn't running hot. I replaced thermostat coolent sensor water pump and radiator and it's still doing the same thing and suggestions
Submitted: 1 year ago.
Category: Chevy
Customer: replied 1 year ago.
Engine over heat on dash.... Any suggestions
Expert:  cardoctor71 replied 1 year ago.

Engine coolant temperature sensor is shorted to ground, replace the sensor should solve your issue, Please Rate my service, if you have additional questions I will answer them until you are completely satisfied with my answers.

Customer: replied 1 year ago.
We replace the coolent sensor already
Expert:  cardoctor71 replied 1 year ago.

There are 2 one for the computer one for the guages and fan both located side by side on thermostat housing, if sensors replaced and still does it, computer is where the short is.