P0128 Error Code
I have been getting a P0128 pretty often lately. It doesn't stay on all the time, sometimes it does go away and comes back. This is the only error code I get when I look up the Check Engine Light.
Based on the error code, I assume its either the Thermostat or the Coolant Temp Switches.
With the car cool, I remove the radiator cap and start the car. The coolant does not flow. I just slow rises after a while. Based on this, I assume the Thermostat is not stuck wide open.
I'm going to test the 2 Coolant Temp Switches. I know the #1 CTS is located at the bottom of the radiator. Can anyone show me a picture of where the #2 CTS is located?
Anyone have an idea what might cause this error code?
Any other troubleshooting ideas?