P0221 means Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance. The DME records it when channel B changes outside its permitted relationship to the companion track; diagnosis must prove the named circuit or mechanism before parts are replaced.
P0220 means Throttle/Pedal Position Sensor/Switch B Circuit Malfunction. The DME records it when channel B disagrees with its paired position track or becomes electrically implausible; diagnosis must prove the named circuit or mechanism before parts are replaced.
P0206 means Injector Circuit/Open Cylinder 6. The DME records it when the cylinder 6 injector circuit remains open or electrically implausible when actuated; diagnosis must prove the named circuit or mechanism before parts are replaced.
P0205 means Injector Circuit/Open Cylinder 5. The DME records it when injector 5 current response is missing or outside the learned electrical window; diagnosis must prove the named circuit or mechanism before parts are replaced.
P0204 means Injector Circuit/Open Cylinder 4. The DME records it when the DME cannot detect the expected electrical response from injector 4; diagnosis must prove the named circuit or mechanism before parts are replaced.
P0203 means Injector Circuit/Open Cylinder 3. The DME records it when the commanded cylinder 3 injection event has an open or implausible electrical load; diagnosis must prove the named circuit or mechanism before parts are replaced.
P054B means Cold Start B Camshaft Position Timing Over-Retarded Bank 1. The DME records it when the exhaust camshaft remains retarded relative to its commanded cold-start position; diagnosis must prove the named circuit or mechanism before parts are replaced.
P052B means Cold Start A Camshaft Position Timing Over-Retarded Bank 1. The DME records it when the intake camshaft remains retarded relative to its cold-start target; diagnosis must prove the named circuit or mechanism before parts are replaced.
P0202 means Injector Circuit/Open Cylinder 2. The DME records it when DME detects an open or invalid electrical response at injector 2; diagnosis must separate an electrical signal fault from a real system fault.
P0161 means HO2S Heater Control Circuit Low Bank 2 Sensor 2. The DME records it when heater control voltage or current remains electrically low for bank 2 sensor 2; diagnosis must separate an electrical signal fault from a real system fault.
P0160 means O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2. The DME records it when bank 2 sensor 2 shows no usable activity after warm-up; diagnosis must separate an electrical signal fault from a real system fault.
P0140 means O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2. The DME records it when bank 1 sensor 2 shows no usable activity after warm-up; diagnosis must separate an electrical signal fault from a real system fault.