why does temperature gauge fluctuate from nearly over heating then back down again?

Asked by Jan 12, 2016 at 01:34 PM about the 2006 Pontiac Grand Prix Base

Question type: General

looks like it wants to over heat but hasn't yet

7 Answers

18,790

Check anti freeze level making sure it's not low.

1 of 1 people found this helpful.

already did that and its still doing the same

6,635

If your antifreeze level is ok and ur cooling fans are kicking in normal you may have sticky thermostat. Can you hear the cooling fans kick in when this happens or are cooling fans already running?

1 of 1 people found this helpful.

the fans are going....do I need to replace the thermostat?

6,635

Yes

ok....thanks

18,790

If vehicle is actually not over heating you may just have a bad coolent temperature sensor or like Irodri911 suggested a bad thermostat stuck in the half open and have closed position or a clogged cooling system that needs to be flushed.

1 of 1 people found this helpful.

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