P0023 means Exhaust Camshaft Position Actuator Circuit/Open Bank 2. The DME records it when the DME detects an open or implausible electrical load at the bank 2 exhaust actuator; diagnosis must separate an electrical signal fault from a real system fault.
P0022 means Intake Camshaft Position Timing Over-Retarded Bank 2. The DME records it when the bank 2 intake camshaft remains more retarded than the DME target; diagnosis must separate an electrical signal fault from a real system fault.
P0021 means Intake Camshaft Position Timing Over-Advanced or System Performance Bank 2. The DME records it when the bank 2 intake camshaft remains more advanced than commanded or cannot follow its target; diagnosis must separate an electrical signal fault from a real system fault.
P0020 means Intake Camshaft Position Actuator Circuit/Open Bank 2. The DME records it when the DME detects an open or invalid electrical load in the bank 2 intake camshaft actuator circuit; diagnosis must separate an electrical signal fault from a real system fault.
P0500 means Vehicle Speed Sensor A Malfunction. The DME records it when DME receives a missing or implausible vehicle-speed signal; diagnosis must separate an electrical signal fault from a real system fault.
P0480 means Cooling Fan 1 Control Circuit Malfunction. The DME records it when DME command does not produce valid fan electrical feedback or operation; diagnosis must separate an electrical signal fault from a real system fault.
P0460 means Fuel Level Sensor A Circuit Malfunction. The DME records it when sender A signal changes implausibly or disagrees with tank conditions; diagnosis must separate an electrical signal fault from a real system fault.
P0441 means Evaporative Emission System Incorrect Purge Flow. The DME records it when purge flow response is absent or implausible when commanded; diagnosis must separate an electrical signal fault from a real system fault.
P0402 means Exhaust Gas Recirculation Flow Excessive Detected. The DME records it when measured EGR effect is greater than commanded; diagnosis must separate an electrical signal fault from a real system fault.
P0400 means Exhaust Gas Recirculation Flow Malfunction. The DME records it when commanded EGR flow does not produce the expected air-mass response; diagnosis must separate an electrical signal fault from a real system fault.
P0341 means Camshaft Position Sensor A Circuit Range/Performance Bank 1. The DME records it when intake-cam position signal disagrees with the expected crank/cam relationship; diagnosis must separate an electrical signal fault from a real system fault.
P0336 means Crankshaft Position Sensor A Circuit Range/Performance. The DME records it when crank position timing or waveform is outside the expected range; diagnosis must separate an electrical signal fault from a real system fault.