Volvo Engine D12D AE E3 (Tier 3) Fault Code: PID172 FMI 5 Air Inlet Temperature

Volvo Engine D12D AE E3 (Tier 3) Fault Code: PID172 FMI 5 Air Inlet Temperature

DETECTION CONDITIONS:
The engine control unit (E-ECU) registers current too low. (EB31)

SYMPTOM:
1. Blue smoke in cold weather conditions.
2. Engine can be difficult to start in cold climate.

POSSIBLE CAUSES:
1. Signal line short-circuited to higher voltage.
2. Open circuit.
3. Defective sensor.

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