2006 Chevy Trailblazer Code P0506 and P0128

Tiny
SOCALBING
  • MEMBER
  • 2006 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 9,000 MILES
The check engine light came on and codes P0128 and P0506 came up? I was told one was a dirty throttle body and the other was the thermostat. Could there also be something that the two codes have in common? I was thinking of the IAT sensor?
Sunday, August 14th, 2011 AT 4:17 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,644 POSTS
P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

po506 indicates the RPM's are lower than they should be. It could be a dirty intake (doubtful) or an issue with the IAC or a vacuum leak.
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Tuesday, September 6th, 2011 AT 5:07 AM

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