VOLVOUU Engine D11L (Tier 4) Fault Code: PID 158 FMI 4 ECU Battery Potential

VOLVOUU Engine D11L (Tier 4) Fault Code: PID 158 FMI 4 ECU Battery Potential

CONTROL UNIT:
Engine ECU

DETECTION CONDITIONS:
The engine control unit (E-ECU) registers that the voltage is below 5.4 V.

SYMPTOM:
The engine can not start.

POSSIBLE CAUSES:
1. Defective alternator.
2. Defective battery, battery cables.