Mechanics

COOLANT TEMPERATURE GAUGE

2007 Pontiac G5 • 4 cylinder FWD Automatic • 48,000 miles

2007 Pontiac G-5 from time to time the temperature reading on the coolant will register ---F instead of a degree. Shortly thereafter then the check engine light will come on. Eventually the correct temperature reading will re-appear I have had it at the mechanic's twice but was unable to pinpont the problem other than it is possibly a sensor. This did not happen all winter but now with warmer weather it has started again. Of course when this does occur the cooling fan runs continuously. Any suggestions rather than just randomly replacing the sensors?
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Spaghetti4breakfast
March 18, 2011.



It sounds like you're getting an intermittent open circuit in the temp sensor. You should pull the codes to see it that is confirmed. The sensor is the most likely cause but it could be anything in the circuit including all related wiring or the PCM itself.
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Wrenchtech
Mar 18, 2011.
I had the same thing happening to my g5, 2007, 2.2. I replaced the thermostat this weekend and so far so good. And it only took my son 5mins to change it. $21.00 @ Pep Boys
Hogie, hoganhill@hotmail. Com

Tiny
Blackcougar
Apr 11, 2011.
The thermostat is going to have NOTHING to do with the electrical gauge issue.

Wrenchtech
Apr 11, 2011.
Well it's Tuesday and it's still working fine.

Tiny
Blackcougar
Apr 12, 2011.
How would you know? It's not your car.

Wrenchtech
Apr 12, 2011.

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