VOLVOUU Engine D13F Fault Code: PPID 122 FMI 3 VCB Compression Brake Status
CONTROL UNIT:
Engine ECU
DETECTION CONDITIONS:
The engine control unit (E-ECU) registers that the current is above 2.2 A.
SYMPTOM:
Reduced engine brake power due to VCB cannot be activated.
POSSIBLE CAUSES:
1. Short circuit in solenoid valve.
2. Short-circuit to frame ground in cable harness.
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