Temperature sensor keeps going out

2008 PONTIAC G6
84,500 MILES • 3.5L • V6 • 2WD • AUTOMATIC
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JOE LONG
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  • 2 POSTS
I have already replaced this sensor twice since thanksgiving of 2016. what would be causing the sensor to keep going out?
Jan 2, 2017 at 8:49 AM
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STEVE W.
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Which sensor? Engine coolant temperature? Ambient air temperature? How do you know it has failed?
Jan 2, 2017 at 12:00 PM
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JOE LONG
  • MEMBER
  • 2 POSTS
It is the engine coolant sensor and it makes my temperature hand not work and causes my fans to run constantly whine the car is running.
Jan 2, 2017 at 12:20 PM
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STEVE W.
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 15,146 POSTS
Okay, that is nothing but a simple thermistor sensor. Two wires and they go directly to the PCM. Take a voltmeter and check the yellow wire for voltage. It should have five volts key on engine off. Now check the other wire, it should be a ground. There is a color change in the wires (shows orange with black stripe changing to tan) so I suspect a connector in the ground side wire, If that connection is dirty it could cause a higher resistance in the circuit and possibly damage the thermistor. The only other option would be a bad run of sensors, maybe try a different parts store?
Jan 2, 2017 at 12:56 PM