BMW 740 IL Troble Codes & Repair

1998 BMW 740
100,000 MILES • V8 • 2WD • AUTOMATIC
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MR.M
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PO302 = Cylinder 2 Misfire Detected. ? PO430 = Catalyst System Efficiency Below Threshold (bank 2). ? PO420 = Catalyst System Efficiency Below Threshold (bank 1). ? PO133 = 02 Sensor Circuit Slow Response (bank 1 Sensor 1).? Any idear where to start to repair these trouble codes? Car not running that good at this time misfiring and chuging.
Aug 14, 2011 at 5:20 PM
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DOCHAGERTY
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Where to start is a good question. I would see if the compression is even in all cylinders first.
Aug 22, 2011 at 1:19 AM
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DR LOOT
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those particular code all lead to a vacuum leak
Dec 20, 2011 at 4:33 AM
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