Volvo Engine D13F Fault Code: PPID 122 FMI 4 VCB Compression Brake Status

Volvo Engine D13F Fault Code: PPID 122 FMI 4 VCB Compression Brake Status

CONTROL UNIT:
Engine ECU

DETECTION CONDITIONS:
The engine control unit (E-ECU) registers that the voltage is below 8 V (0.33 x Ubat).

SYMPTOM:
1. VCB can not be turned off.
2. Engine stops or cannot be started.

POSSIBLE CAUSES:
1. Short-circuit in cable harness.
2. Defective solenoid valve.

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