SAE P2xxx DTCs

09A Transmission

DTC	Error Message	Diagnostic Procedure	Malfunction Criteria and Threshold Value	Secondary Parameters with Enable Conditions	Monitoring Time Length	Frequency of checks, MIL Illumination
P2122	Throttle/Pedal Position Sensor/Switch "D" Circuit Low Input	Check the Throttle Position (TP) Sensor G79 / Accelerator Pedal Position Sensor 2 G185. Refer to → Throttle Position (TP) Sensor G79 / Accelerator Pedal Position Sensor 2 G185 , checking .	Signal invalid, Error value received	CAN-bus must be active	30 ms
P2181	Cooling System Performance	Check Engine Coolant Temperature (ECT) Sensor -G62-. Refer to Engine Coolant Temperature (ECT) Sensor G62 , checking
P2637	Torque Management Feedback Signal A	Check CAN BUS connection between Motronic Engine Control Module (ECM) J220 and Transmission Control Module (TCM) J217. Refer to → CAN-Bus terminal resistance, Transmission Control Module (TCM) J217 to Engine Control Module (ECM) J220 checking .	ECM not able to follow the torque request, Bit torque management is set	CAN-bus must be active	30 ms