BMW Ignition / Misfire Fault Codes
Cylinder misfires, coil pack failures, plug wear, fuel injector issues.
9 codes in this category.
P0301Cylinder 1 Misfire DetectedCylinder 1 not firing reliably - swap coil and plug to confirm.highP0302Cylinder 2 Misfire DetectedCylinder 2 not firing reliably.highP0303Cylinder 3 Misfire DetectedCylinder 3 misfire.highP0304Cylinder 4 Misfire DetectedCylinder 4 misfire.highP0305Cylinder 5 Misfire DetectedCylinder 5 misfire.highP0306Cylinder 6 Misfire DetectedCylinder 6 misfire.highP0300Random Multiple Cylinder MisfireMultiple cylinders misfiring - whole-engine cause likely.highP0301Cylinder 1 Misfire DetectedCylinder 1 misfire.high4E83Glow Plug Cylinder 1Diesel glow plug fault on cylinder 1.low