BMW OBD Codes: Meaning & Fixes

P0171 Powertrain The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees… Moderate P0174 Powertrain The cylinder bank without cylinder 1 is running lean even with the maximum fuel correction… Moderate P0430 Powertrain The bank 2 converter on a V6, V8 or split-exhaust engine isn't cleaning the exhaust well enough. Low P0562 Powertrain The engine computer sees too little supply voltage – usually a charging, battery or ground… Moderate

P0014 Powertrain The bank 1 exhaust cam won't follow its target and stays too far advanced; think oil, valve… Moderate P0015 Powertrain The bank 1 exhaust cam sits later than commanded; a stretched chain or stuck exhaust phaser… Moderate P0016 Powertrain The bank 1 intake cam and the crankshaft are out of step, most often from a stretched or jumped… High P0087 Powertrain Measured fuel pressure has dropped well below what the engine computer is asking for. High P0171 Powertrain The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees… Moderate P0174 Powertrain The cylinder bank without cylinder 1 is running lean even with the maximum fuel correction… Moderate P0217 Powertrain The engine overheated. Stop driving: continuing can warp the head, blow the head gasket… Critical P0306 Powertrain Cylinder 6 is misfiring. On an inline-six it's the hot rear cylinder; on GM and Hemi V8s it can… Moderate P0330 Powertrain The second knock sensor, usually the one for the bank without cylinder 1, has a circuit fault. Low P0356 Powertrain The coil F circuit for cylinder 6 failed its check. On inline sixes it's the coil… Moderate P0411 Powertrain The air pump runs at cold start, but the right amount of air isn't reaching the exhaust. Low P0418 Powertrain The ECU sees a fault in the relay circuit that switches the secondary air pump on and off. Low P0430 Powertrain The bank 2 converter on a V6, V8 or split-exhaust engine isn't cleaning the exhaust well enough. Low P0491 Powertrain Too little cold-start air reached the bank 1 exhaust during the self-test; pump, combi valve… Low P0492 Powertrain The cold-start air check found too little air on the bank 2 side only, so look at that side's… Low P0562 Powertrain The engine computer sees too little supply voltage – usually a charging, battery or ground… Moderate P0597 Powertrain The electrically heated thermostat's heater circuit is open, so the ECU can't open it early… Low P2181 Powertrain The engine isn't warming up or holding temperature the way the computer's model says it should. Low P2457 Powertrain The EGR cooler isn't cooling the recirculated exhaust enough – it's clogged, bypassed or low… Moderate