Having problems with your 2002 Pontiac Grand Prix ?

My heater and defrost will not work when you crank the car and leave it running for a few minutes. I have to actually drive the car before it will heat up. the low coolant light comes on and off, there is plenty of coolant in the reservior. the temp. gauage will go up to about 240 then it falls down to normal then it will go to about 200 then drop down. Is there a sensor going out. My check engine light is on.

Posted / edited by AnonymousUser on : 15-10-2018

Answers :

Hello! If the vehicle is started when cold will the temperature gauge reach normal if allowed to idle? if the gauge does not, but acts erratically, does the heat work normally?
The main issue is the Check Engine Light (CEL)...Take the vehicle to an auto parts store and have them run a scan to determine the trouble code or codes that are stored...Once you have the code send them to me and I'll solve the problem...Guru...saailer
Repair Help & Product Troubleshooting for 2002 Pontiac Grand Prix

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