Hyundai OBD Codes: Meaning & Fixes

P0300 Powertrain The engine computer sees misfires that jump between cylinders or hit several cylinders at once. High P0420 Powertrain The bank 1 catalytic converter no longer stores enough oxygen to clean the exhaust properly. Low P0302 Powertrain Cylinder 2 keeps misfiring. On inline engines it's a middle cylinder, so rule out coolant… Moderate P0303 Powertrain Cylinder 3 is misfiring. Check whether it misses at idle or under load before you blame… Moderate P0304 Powertrain Cylinder 4 is misfiring. Its end or rear position makes water, oil and intake leaks common… Moderate P0301 Powertrain Cylinder 1 is repeatedly failing to fire. The cause is almost always its coil, plug, injector… Moderate

B1346 Hyundai · Body The airbag computer measured too much resistance in the driver airbag circuit; it may not… High B1448 Hyundai · Body The sensor mat in the passenger seat cushion failed its self-test, so the passenger airbag… High B1764 Kia · Body Kia's passenger seat detection unit reports a broken sensor mat, so airbag suppression can't be… High P0087 Powertrain Measured fuel pressure has dropped well below what the engine computer is asking for. High P0300 Powertrain The engine computer sees misfires that jump between cylinders or hit several cylinders at once. High P0524 Powertrain Measured oil pressure fell below the safe minimum. Stop the engine now and check the oil before… Critical P1295 Hyundai · Powertrain Hyundai's engine computer no longer trusts the electronic throttle and has cut power as… High P1326 Hyundai · Powertrain Hyundai's KSDS software heard vibration typical of worn rod bearings and put the engine in limp… Critical