My service engine soon light came on. I stopped at Auto Zone and this is it. Coolant temp is always low. The powertrain control module verifies that the engine is at a proper operating temperature. It was low on coolant and I put some in, however the light is still on. Am I supposed to reset it somehow. Or is there another problem. It did list some other possible causes. Thermostat defective, and ECI sensor defective. I drove the car 100 miles with the light on in one trip before I got the diagnostic, and the engine temp stayed below about 180. This is a 2001 Pontiac Grand Prix GT.
have the same problem?
Tuesday, November 30th, 2010 AT 11:35 AM