Volvo Engine D11L (Tier 4) Fault Code: PPID 122 FMI 3 VCB Compression Brake Status

Volvo Engine D11L (Tier 4) 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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