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2005 Chevy Impala ovewrheating

Tiny
JR1367
  • MEMBER
  • 2005 CHEVROLET IMPALA
  • V8
  • FWD
  • AUTOMATIC
  • 74,000 MILES
Occasionally the car temperature indicator shows it to be overheating, however, when checking under the hood, no indication that the engine is hot. Could this perhaps be a sending unit defect?
Monday, November 24th, 2008 AT 9:40 AM

1 Reply

Tiny
RENAUDTN
  • MECHANIC
  • 636 POSTS
Have you checked the actual temperature at the thermostat housing with a thermometer (infrared thermometer)?
The same reading would rule out your coolant sensor.
If you have a scanner that reads sensors input, you could also hook it up and compare the temp reading received by your pcm and the reading you get from a thermometer.
You need to find out for sure if your car is indeed overheating when the temp gauge goes up.
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Monday, November 24th, 2008 AT 11:16 AM

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