VOLVOUU Engine D13F Fault Code: PID 131 FMI 3 Exhaust Back Pressure

VOLVOUU Engine D13F Fault Code: PID 131 FMI 3 Exhaust Back Pressure

CONTROL UNIT:
Engine ECU

DETECTION CONDITIONS:
The engine control unit (E-ECU) registers that the voltage is above 4.8 V.

SYMPTOM:
Reduced engine brake power.

POSSIBLE CAUSES:
1. Sensor fault.
2. Damaged wiring harness.