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- US Emissions (https://www.cadillacforum.com/forum/us-emissions-47/)

- - Trouble code p128 (https://www.cadillacforum.com/forum/us-emissions-47/trouble-code-p128-11594/)

Wes Lowery

12-29-2010 05:58 PM

Trouble code p128

On my 2004 CTS, I read code P128 on my reader when the check engine light came on. I reset it and it didn't come back for a couple of months. Where do I start troubleshooting? Thermostat or temperature sensor?

Stealth

12-30-2010 09:39 AM

did the AC got serviced recently?

P128 (E128) .................. A/C was disabled because of high refrigerant pressure

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