P0128 Code
Thread Starter
Pro
Joined: Sep 2008
Posts: 537
Likes: 2
From: Whitesboro Texas
P0128 Code
I have a 2003 coupe, that has all of a sudden started throwing a "10-PCM P0128" code, only in the morning when it is cold (around freezing or below). From what I have found, this is to signal a possible stuck thermostat. If the thermostat was sticking, wouldn't it throw the code all the time? The thermostat, stock 185 degree, was replaced with the water pump in Nov 2014.
If the temperature sensor is going out, could this also throw this code? I have 107k miles on the car, so I am expecting to start replacing various sensors now.
If the temperature sensor is going out, could this also throw this code? I have 107k miles on the car, so I am expecting to start replacing various sensors now.
Melting Slicks
Joined: Jan 2008
Posts: 2,590
Likes: 48
From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
Not sure if you looked at this, but here you go.
https://www.corvetteforum.com/forums...109-p0128.html
There are other codes associate with the ECT sensor too.
P0117 Engine Coolant Temp (ECT) Sensor Low Voltage
P0118 Engine Coolant Temp (ECT) Sensor High Voltage
P0118 Engine Coolant Temperature (ECT) Excessive Time to Closed Loop Fuel Control
https://www.corvetteforum.com/forums...109-p0128.html
There are other codes associate with the ECT sensor too.
P0117 Engine Coolant Temp (ECT) Sensor Low Voltage
P0118 Engine Coolant Temp (ECT) Sensor High Voltage
P0118 Engine Coolant Temperature (ECT) Excessive Time to Closed Loop Fuel Control
Last edited by CamminC5; Jan 19, 2016 at 08:53 PM.
A quick and easy job that's not too expensive.
