Trouble code p128

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Dec 29, 2010 | 05:58 PM

Wes Lowery

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Joined: Dec 2010

Posts: 2

From: Whittier, CA

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?

Dec 30, 2010 | 09:39 AM

Stealth

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Joined: Feb 2007

Posts: 3,945

did the AC got serviced recently?

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

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