OBD-II trouble codes
Ranked by how often the code appears in real NHTSA owner complaints - not alphabetically. P = powertrain, B = body, C = chassis, U = network.
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Codes whose typical symptoms include flashing check engine light - most serious first:
P0201Cylinder 1 Injector A CircuitP0203Cylinder 3 Injector A CircuitP0300Random/Multiple Cylinder Misfire DetectedP0301Cylinder 1 Misfire DetectedP0302Cylinder 2 Misfire DetectedP0303Cylinder 3 Misfire DetectedP0304Cylinder 4 Misfire DetectedP0305Cylinder 5 Misfire DetectedP0306Cylinder 6 Misfire DetectedP0307Cylinder 7 Misfire DetectedP0308Cylinder 8 Misfire DetectedP0351Ignition Coil A Primary Control Circuit/OpenP0352Ignition Coil B Primary Control Circuit/OpenP0353Ignition Coil C Primary Control Circuit/OpenP0354Ignition Coil D Primary Control Circuit/OpenP0355Ignition Coil E Primary Control Circuit/OpenU0404Invalid Data Received From Gear Shift Control Module A