Volvo Engine D11L (Tier 4) Fault Code: PPID 122 FMI 5 VCB Compression Brake Status
Volvo Engine D11L (Tier 4) Fault Code: PPID 122 FMI 5 VCB Compression Brake Status
CONTROL UNIT:
Engine ECU
DETECTION CONDITIONS:
The engine control unit (E-ECU) registers that the voltage is between 8 V and 16 V (0.33 x Ubat and 0.66 x Ubat).
SYMPTOM:
Reduced engine brake power due to VCB cannot be activated.
POSSIBLE CAUSES:
1. Open/short circuit in cable harness.
2. Defective solenoid valve.
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