Dodge OBD Codes: Meaning & Fixes

P0420 Powertrain The bank 1 catalytic converter no longer stores enough oxygen to clean the exhaust properly. Low P0300 Powertrain The engine computer sees misfires that jump between cylinders or hit several cylinders at once. High 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 P0335 Powertrain The engine computer lost the crankshaft position signal. Expect stalling or a crank-no-start. High

P0128 Powertrain The engine takes too long to warm up, which almost always points to a thermostat stuck open. Low P0216 Powertrain The ECU can't control or confirm injection timing, usually on a diesel with an electronic… High P0300 Powertrain The engine computer sees misfires that jump between cylinders or hit several cylinders at once. High 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 P0306 Powertrain Cylinder 6 is misfiring. On an inline-six it's the hot rear cylinder; on GM and Hemi V8s it can… Moderate P0335 Powertrain The engine computer lost the crankshaft position signal. Expect stalling or a crank-no-start. High P0420 Powertrain The bank 1 catalytic converter no longer stores enough oxygen to clean the exhaust properly. Low P0622 Powertrain The alternator's field control or field feedback circuit is faulty – output may drop out… Moderate P0627 Powertrain The PCM's fuel pump command line has no complete circuit – a dead relay coil, open wire, fuse… Moderate P0641 Powertrain The PCM's shared 5-volt supply 'A' is missing or out of range – often one shorted sensor… High P06DD Powertrain The ECM commanded an oil pressure change and the measured pressure didn't respond – check… High P0700 Powertrain The transmission computer found a fault and asked for the check engine light – read the TCM… Moderate P0732 Powertrain Second gear isn't holding: the input-to-output speed ratio in 2nd is outside the expected range. Moderate P0750 Powertrain The transmission computer sees a fault in shift solenoid A or its circuit and can't use it… Moderate P0755 Powertrain The TCM detects an electrical problem with shift solenoid B, the second on/off shift valve. Moderate P0841 Powertrain Pressure sensor or switch A reports a value that doesn't fit the gear or pressure the TCM… Moderate P0868 Powertrain Measured transmission line pressure is below what the TCM commanded – clutches can slip… High P0884 Powertrain The transmission computer's power supply dropped out briefly – usually a battery, ground… Moderate P0887 Powertrain The circuit that switches the transmission power relay reads high voltage when it shouldn't. Moderate U0100 Network Another module stopped hearing from the engine computer on the CAN network. High U0101 Network The engine computer and other modules stopped hearing from the transmission control module. High U0141 Network A body module labeled "A" went silent; on many trucks and SUVs it is the smart fuse box under… Moderate