July 6, 2010

So i`ve been having some trouble with one of my `04 chevy colorados. The truck is driving sluggishly and when connected to the diagnostics it states trouble code P0118 - "Engine Coolant Temperature Circuit High Input"

This has happened once before and I replaced the ECT sensor already and it ran fine for about 2 months with no problems. Now the same problem is occuring again and I`m starting to think theres a problem with the harness or something more??

Also, when I tried to wiggle test the sensor while watching the readings through the OBDII it dropped down to -40 C and the temp guage on the dash dropped all the way down to 0.

Any ideas??? I`m really hoping it`s not a problem with the PCM and I just have bad luck with these sensors