2004 GMC Envoy "p0128 code engine" Questions

...P0128 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 ...

code P0128 Do you know what this is? Where is the Engine Coolant Sensor located on my 2002 Envoy? The Chiltons manual says P0128 is insufficient ambient temperature (ECT). ECT is Engine Coolant Sensor

NOT SHOWING TEMP ON GAUGE,ENGINE LIGHT IS ON,FANS RUN CONSANT,CODE P0128,ECT SENSOR,PONTIAC MONTANA 2001 You may want to check out http://www.obd-codes.com/p0128 it has some good info on your problem.

...Code is P0128 Ah the famous P0128.....It's 1 of 2 things. If your fan is not engaged constantly (would sound like an airplane or big rig everytime you step on the gas) and is working properly, that ...

...P0128 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 ...

...engine light remains illuminated. Diagnostics revealed codes: P1133 and P0128. P1133 points to a heated oxygen sensor and P0128 indicates a possible defective thermostat. The O2 sensor was replaced ...

...Code P0128 indicates a faulty thermostat, more than likely it is always in the open position causing the coolant to come up to operating temperature too slowly. My suggestion is to find a different ...

...p0128 engine coolant thermostat below operating temp. Possible low on antifreeze. not plugged in, possible chaffed wires. P0106 pertains to the throttle body. most cases involve cleaning the throttle ...

...code p1514 and reduced power light on engine shuts down Was fine then when I started it and drove it the reduced power light came on and engine shuts down shows codes p1514,p0128 and p0440 Type: OBD ...

...P0128 is a code for low coolant temperature. This is a fairly common 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 ...