Volvo Engine D11L (Tier 4) Fault Code: PID 111 FMI 1 Coolant Level

Volvo Engine D11L (Tier 4) Fault Code: PID 111 FMI 1 Coolant Level

CONTROL UNIT:
Engine ECU

DETECTION CONDITIONS:
The engine control unit (E-ECU) registers low coolant level.

SYMPTOM:
None

POSSIBLE CAUSES:
1. Low coolant level.
2. Signal line contains a short circuit to a lower voltage.