2006 Chevy Trailblazer Code P0506 and P0128

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

JACOBANDNICKOLAS

MECHANIC
109,885 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.