Unplug the coolant temperature sensor and start the engine. The service engine soon light will come on, ignore it. Your radiator cooling fans should come on at high speed immediately. If they do, the coolant temperature sensor is bad. If they don't, check the three fan relays in the underhood fuse box. Each fan has its own relay and the third relay is for both fans to run at high speed. Hope that helps! Jim
cooling fans not working, 02 grand prix se 3.1
2002 Pontiac Grand Prix SE
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Maintenance & Repair
Maintenance & Repair
I have an 02 Pontiac grand Prix some days it cranks up and runs fine no problem and other days like now get in it to crank it and all it does is spin over and will not crank has 3.8 l v6
2002 Pontiac Grand Prix GT
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Maintenance & Repair
I have an 02 grand prix..my key stays stuck in the ignition is there an easy to fix this problem? Also my shifter is broke I have to use a small screwdriver to push in the shift release button to mov...
2002 Pontiac Grand Prix SE
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Maintenance & Repair
I have an 05 Pontiac grand prix. Temp gauge was randomly dropping off to nothing while driving. Had a new thermostat about 6 months ago, just changed temperature coolant sensor. Works fine for...
2005 Pontiac Grand Prix Base
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Maintenance & Repair
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