2002 GMC Envoy "code thermostat" Questions

...that mean? The generic code stands for Coolant Thermostat (the Coolant Temperature is below the thermostat regulating temperature) Need to replace thermostat according to that it is opening too

code is to indicate a faulty thermostat. Similar codes: P0125 In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the

Fault code PO128 Code 128 is telling you the engine temp is below the thermostat rating. Usually means the thermostat is stuck open and not making the engine warm up.

...code comes up changed ect sensor thermostat gauge does not come off 100 check gauge light comes on then service engine light problems with cruise control shutting off whats next code p0118 refers to ...

...thermostat and the code will go away. Engine temperature needs to be at 210 degrees on these engines. If the fan clutch is constantly engaged, it's cooling the engine off constantly and won't get up ...

...code I believe when t-stat is defective, and will need to be cleared, if that is set in ECM. Make sure to run engine afterwards and keep filling coolant until all air is removed from system and ...

...code being set. The thermostat is more likely the culprit. The P0128 code indicates that the coolant temperature is not coming up to operating range fast enough and this is usually because of a ...

code on the Envoys/trailblazers. The usual fix is to replace the thermostat. This is not a DIY friendly job as some of the work needs to done from the top and some needs to be done through the drivers

...code came up as a low coolent, bad coolent sensor, or bad thermostat. It seems that my thermostat may get stuck open. Could this damage my vehical? Should it be a immediate fix or could it wait until ...

CODE #PO128 KEEPS RETURNING AND AC CUTTING IN & OUT It's a thermostat/coolant issue. The definition is here: P0128 Engine Coolant Temperature Below Thermostat Regulating Temperature Possible ...