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I have an '05 CTS and the Service A/C System code came up on my screen. The pressure was low and my local repairman (not a dealer) serviced my air conditioning and said it's fine. HOWEVER, he could not clear the message and it still comes up everytime I start the car. MUST I take this to a dealer to clear this code? I tried the f1 and f6 trick, did not work. Can anyone help?

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My guess is that you can simply disconnect the negative battery terminal, forcing a reset/reboot

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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