2012 Malibu engine coolant gauge not working.
Thread Starter
CF Beginner
Joined: Oct 2016
Posts: 1
Likes: 0
2012 Malibu engine coolant gauge not working.
Hey ya'll,
My wife owns a 2012 Chevrolet Malibu 4cyl. This morning she called me to tell me her engine collateral temp gauge is quit working. At the same time, her a/c no longer blows cold air. It blows air of ambient temperature. I suspect it to be the ECT sensor or thermostat. I have eliminated the resistor block on the compressor, the battery is brand new, and all of her connections seem to be in good standing. The only other item I can think of it being would be the BCM itself. Does anyone have any other ideas of what it might be? I am basically at wits end, the a/v quits on us once a year and we have to replace the control unit in the dash every time. This car is quickly becoming the worst vehicle we have ever owned. However, a new vehicle is not in the cards right now, so I have to do what is necessary to keep this vehicle running appropriately. So any ideas from ya'll would be greatly appreciated.
My wife owns a 2012 Chevrolet Malibu 4cyl. This morning she called me to tell me her engine collateral temp gauge is quit working. At the same time, her a/c no longer blows cold air. It blows air of ambient temperature. I suspect it to be the ECT sensor or thermostat. I have eliminated the resistor block on the compressor, the battery is brand new, and all of her connections seem to be in good standing. The only other item I can think of it being would be the BCM itself. Does anyone have any other ideas of what it might be? I am basically at wits end, the a/v quits on us once a year and we have to replace the control unit in the dash every time. This car is quickly becoming the worst vehicle we have ever owned. However, a new vehicle is not in the cards right now, so I have to do what is necessary to keep this vehicle running appropriately. So any ideas from ya'll would be greatly appreciated.
Super Moderator
Joined: Mar 2011
Posts: 9,175
Likes: 521
by engine collateral temp gauge you mean the engine coolant temperature gauge in the instrument cluster or the ambient temperature reading?
check for codes and if a ect dtc circuit high is set unplug the sensor connector and check for 5volt ref voltage and grd. if that is good jumper the connector pins together and see is a dtc for circuit low is set. if it is, replace the sensor.
check for codes and if a ect dtc circuit high is set unplug the sensor connector and check for 5volt ref voltage and grd. if that is good jumper the connector pins together and see is a dtc for circuit low is set. if it is, replace the sensor.
