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Prev Professional Automotive Repair Technical Discussions for October 11, 2015
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2009 GMC Acadia SLT 3.6L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GKER23D79
7 months ago it had a misfire on cyl. #1 I replaced the coil and spark plug and all was good till now. This time it had P0300, P0301 plus P0303 and P0305 in history and a rich code for the H02S B1 S1 (MV) 700 plus all the time but got higher as it warmed up.I ... Trouble codes: P0300 (p0301 -), P0301 (p0303-), P0303 (p0305-), P0305 (testing and results)
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