Volvo All Engines (2013 Emissions) Fault Code: P113900 PID: EMS Turbo Compound Buffer Air Pressure Sensor Circuit High

Volvo All Engines (2013 Emissions) Fault Code: P113900 PID: EMS Turbo Compound Buffer Air Pressure Sensor Circuit High

Circuit description
The primary function of the Buffer Air Valve Unit (BVU) is to supply the turbocompound with constant air pressure and flow. Air is supplied between the turbocompound oil seals to compensate for pressure differences and reduce the possibility of oil leakage. The system includes a pressure sensor in the air supply line on the BVU housing to ensure proper functioning of the BVU and correct air supply to the turbocompound seals. The pressure sensor is also used for OBD monitoring of the system

Conditions for diagnostic trouble code (DTC)
Circuit Short To Battery

Diagnostic operating conditions
Ignition key in ON position

Probable cause
1) Connector
2) Wiring harness
3) Turbo Compound Buffer Air Pressure Sensor
4) Engine Management System (ECM)