2001 GA GT cooling fan running constantly and gauge set at 100 degrees

[GAGT01]

My 2001 Grand Am GT has the cooling fans running constantly and the temperature gauge stay at 100 degrees. I changed the temp. sensor but that did nothing. My heat is still good. Any suggestions?! I'm lost!!

[xeroinfinity]

Welcome to AF.

If the sensor is good, check the wires to/from the sensor they can break and that sounds like your trouble.

It could also be a relay for the fans stuck on.
They are in the fuse box under the hood.

Here's a link to test your temp ciruit might be usefull.
Coolant Temp Sensor on 99+ Grand Am Testing

Hope that helps.

[Peter E]

I had the same problem with my car. The fan always ran and the coolant temp gauge didn't move. It gave a P0128 code. I believe this means the coolant temp is taking too long to reach proper operating temperature, (Probably the thermostat is stuck slightly open)

After looking at what a pain the thermostat will be to change on the 3.4L, I decided to grab a scan tool and reset the code myself a couple of times a month. This seems to instantly turn the fans off and the temp gauge starts to work.

Once winter is over, I will tackle the thermostat, hopefuly without having to take the throttle body off.

hope this helps

[xeroinfinity]

Realy the thermostat on the 3.4 is a piece of cake compared to the 2.4/2.2 , which is under the pass side of the motor.

That's a PITA !