2001 Chevy Blazer Temerature Sensor

Tiny
THEDON
  • MEMBER
  • 2001 CHEVROLET BLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
My engine light is on and the code for it is PO128. It is either thermostat or temp sensor (ECT). The truck doesn't run hot or anything, so I would not believe it would ve the thermostat. Is it hard to replace the sensor and where is it located at. Thanks.
Monday, January 21st, 2008 AT 6:46 AM

1 Reply

Tiny
DENNYP
  • MECHANIC
  • 1,824 POSTS
Most often, it is a bad thermostat. The sensor is located on the driver side cylinder head, near the rear spark plug. It should have a two wire connector.
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Monday, January 21st, 2008 AT 10:08 PM

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