Engine Coolant temperature sensor?

Tiny
MRV21
  • MEMBER
  • 2004 OLDSMOBILE ALERO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 11,700 MILES
Is there a quick check for the temperature sensor to make sure it is good? I would rather check this first before r/r the thermostat. Thanks.
Wednesday, March 11th, 2009 AT 11:22 AM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Inspect for the following conditions:

Corrosion on the ECT sensor terminals
Improper or corroded terminals at the ECT harness connector
Loose terminals in the ECT harness connector.

If all OK here, measure the voltage from the signal circuit of the ECT sensor to a good ground with a DMM. Voltages should be 4.8 - 5.2 V.

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Wednesday, March 11th, 2009 AT 1:52 PM

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