tannertaylormusic Posted April 19, 2011 Report Share Posted April 19, 2011 Have noticed a slight hesitation while idling at stoplights. Yesterday, while speeding up out of a sharp curve I heard about 7 "popping" sounds. I've had backfire issues before, but this sounded different. The sound was more "mechanical" than a backfire.. The car had noticeable acceleration problems after this occurred. My Caddy now shows these codes: PCM 1645 C ACM B1347 PZM BO533 B2502 IRC B1771 I know that the refrigerant level is low, and the AC Compressor is off - the car shows me that every time I start it. Would this affect the way the car drives as well? Also, any helpful tips on the other codes? Link to comment Share on other sites More sharing options...
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