02 grnd prix,1or2 temp send units

Asked by Adam Dec 08, 2020 at 01:14 AM about the 2002 Pontiac Grand Prix SE

Question type: Maintenance & Repair

cooling fans not working, 02 grand prix se 3.1

1 Answer
155,705

James answered 3 years ago

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

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