ESP control unit - fault code description, MESFI - AD07.61-P-4000-66M

1	Fault code	P20D8 ESP control unit, status (-)
	(Fault code according to OBD)	P20D9 Torque request from the ESP control unit (N47-5) is implausible (-) P20DA CAN transmission error of torque request from control unit from ESP control unit (-) 20DB CAN transmission error of torque request from control unit from ESP control unit (-)
2	Fault storage	After expiry of test duration and fault
	Actuation of engine diagnosis indicator lamp (EURO4) or CHECK ENGINE (MIL)	no activation
3	Checking frequency	Continuous
4	Checked signal or status
	P20D8	Options: normal operation without fault, fault detected, unknown fault detected or rolling operation (emission test) detected.
	P20D9	The torque request from the ESP control unit (N47-5) to the engine control unit is monitored. Here a plausibility check is made for its order of magnitude. In case of error a substitute value is created.
	P20DA, P20DB	CAN transmission errors are detected by two different test procedures.
5	Check prerequisites	CAN without error
6		Also read out the ESP control unit fault memory.