2002 chevy impala 3.4 engine. when the car is still cold and i,m driving it says coolant temp hot. help!

Asked by Jan 03, 2014 at 09:40 PM about the 2002 Chevrolet Impala Base

Question type: Maintenance & Repair

the water pump, the thermostat, and the radiator have all been replaced, but the car still
says hot coolant temp and there is no heat. please help i love this car and dont want to
give it up.

2 Answers

63,205

Did you replace the coolant temperature sensor. If the sensor is shorted internally the computer will "think" the coolant is hot. Also check the wiring going to the sensor. If it's damaged a bare spot on the wire(s) may be touching something metal. Same deal. You MAY have 2 sensors for this. One sensor for the gauge on the dash, if equipped, and one for the computer. If you have a temperature gauge on the dash is it reading correctly or is it pinned on hot? HTH. -Jim

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107,605

Did you make sure you got all the air out of the cooling system after replacing the above listed items?

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