2006 Chevy Trailblazer Code P0506 and P0128

2006 CHEVROLET TRAILBLAZER
9,000 MILES • 6 CYL • 2WD • AUTOMATIC
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SOCALBING
  • MEMBER
  • 1 POST
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?
Aug 14, 2011 at 4:17 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 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.
Sep 6, 2011 at 5:07 AM
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