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


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

1 out of 1 people think this is helpful.

already did that and its still doing the same


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 out of 1 people think this is helpful.

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





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 out of 1 people think this is helpful.

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