Volvo

Volvo All Engines (2013 Emissions) Fault Code: P25793A PID: EMS Turbocharger Speed Sensor “A” Circuit Range/Performance

The Turbo Speed Sensor is an inductive sensor. When the engine is running, the turbocharger shaft rotates past the Turbo Speed Sensor tip and a pulsed voltage signal is generated. The Engine Control Module (ECM) monitors the frequency of the signal generated by the Turbo Speed Sensor to calculate the turbo speed.
The turbo speed signal is used to calculate fuel injection.

Conditions for diagnostic trouble code (DTC):
1) A charge air pressure sensor that is indicating a higher than normal value in some cases can set a turbocharger speed sensor fault

Probable cause
1) Turbo Speed Sensor
2) Incorrectly installed sensor
3) Faulty parameters

Volvo All Engines (2013 Emissions) Fault Code: P259C00 PID: EMS Excessive Time To Enter Closed Loop Turbocharger “A” Boost Control

The (VGT) Variable Geometry Turbocharger Actuator is a self-contained component with motors, sensors and a control unit.
The (VGT) Variable Geometry Turbocharger uses a movable nozzle to adjust the intake manifold pressure for various operating conditions. Nozzle movement is controlled by an actuator mounted on the tubocharger. When the Engine Control Module (ECM) Relay is energized, a fuse supplies battery voltage to the (VGT) Variable Geometry Turbocharger and the unit is grounded by means of the engine block.

Conditions for diagnostic trouble code (DTC):
1) Component disabled by internal diagnostics

Observable symptoms
1) None

Probable cause
1) Actuator
2) VGT Mechanism

Volvo All Engines (2013 Emissions) Fault Code: P25A911 PID: EMS Piston Cooling Oil Control

Circuit description
The engine piston cooling oil supply valve is located in the oil filter housing and is used to control the piston cooling oil pressure. The engine control module (ECM) controls the valve by monitoring the signal from the piston cooling oil pressure sensor. If an electrical fault is detected inside the valve it will be fully open (fail safe).

Conditions for diagnostic trouble code (DTC)
Output not activated
The voltage at pin A14.EB:41 is less than 33?% of the battery voltage

Diagnostic operating conditions
Ignition key in ON position

Observable symptoms
None

Probable cause
1) Short circuit to ground in the component or wiring
2) Piston Cooling Valve

Volvo All Engines (2013 Emissions) Fault Code: P25A912 PID: EMS Piston Cooling Oil Control

Circuit description
The engine piston cooling oil supply valve is located in the oil filter housing and is used to control the piston cooling oil pressure. The engine control module (ECM) controls the valve by monitoring the signal from the piston cooling oil pressure sensor. If an electrical fault is detected inside the valve it will be fully open (fail safe).

Conditions for diagnostic trouble code (DTC)
Output activated
Short circuit to battery voltage – A14.EB:41

Diagnostic operating conditions
Ignition key in ON position

Observable symptoms
Low oil pressure at low engine speed

Probable cause
1) Short circuit to voltage supply, control wire
2) Short circuit in control valve

Volvo All Engines (2013 Emissions) Fault Code: P25A913 PID: EMS Piston Cooling Oil Control

The engine piston cooling oil supply valve is located in the oil filter housing and is used to control the piston cooling oil pressure. The engine control module (ECM) controls the valve by monitoring the signal from the piston cooling oil pressure sensor. If an electrical fault is detected inside the valve it will be fully open (fail safe).

Conditions for diagnostic trouble code (DTC):
1) Output not activated
2) The voltage at pin A14.EB:41 is between 33?% and 67?% of the battery voltage

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) Low oil pressure at low engine speed

Probable cause
1) Open circuit on common supply wire or open circuit on fuse FE9
2) Control wire in engine wiring harness
3) Piston Cooling Valve

Volvo All Engines (2013 Emissions) Fault Code: P25A971 PID: EMS Piston Cooling Oil Control

Circuit description
The engine piston cooling oil supply valve is located in the oil filter housing and is used to control the piston cooling oil pressure. The engine control module (ECM) controls the valve by monitoring the signal from the piston cooling oil pressure sensor. If an electrical fault is detected inside the valve it will be fully open (fail safe).

Probable cause
Piston Cooling Valve

Detailed information
1) Mechanical system not responding properly

Volvo All Engines (2013 Emissions) Fault Code: P25AA00 PID: EMS Piston Cooling Oil Control Circuit Low

The engine piston cooling oil supply valve is located in the oil filter housing and is used to control the piston cooling oil pressure. The engine control module (ECM) controls the valve by monitoring the signal from the piston cooling oil pressure sensor. If an electrical fault is detected inside the valve it will be fully open (fail safe).

Conditions for diagnostic trouble code (DTC):
1) Output not activated
2) The voltage at pin A14.EB:41 is less than 33?% of the battery voltage

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) None

Probable cause
1) Short circuit to ground in the component or wiring
2) Piston Cooling Valve

Volvo All Engines (2013 Emissions) Fault Code: P25AB00 PID: EMS Piston Cooling Oil Control Circuit High

The engine piston cooling oil supply valve is located in the oil filter housing and is used to control the piston cooling oil pressure. The engine control module (ECM) controls the valve by monitoring the signal from the piston cooling oil pressure sensor. If an electrical fault is detected inside the valve it will be fully open (fail safe).

Conditions for diagnostic trouble code (DTC):
1) Output activated
2) The current at pin A14.EB:41 is above 2.2?A

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) Low oil pressure at low engine speed

Probable cause
1) Short circuit to voltage supply, control wire
2) Short circuit in control valve

Volvo All Engines (2013 Emissions) Fault Code: P25AC00 PID: EMS Piston Cooling Oil Control Circuit Performance/Stuck Off

The engine piston cooling oil supply valve is located in the oil filter housing and is used to control the piston cooling oil pressure. The engine control module (ECM) controls the valve by monitoring the signal from the piston cooling oil pressure sensor. If an electrical fault is detected inside the valve it will be fully open (fail safe).

Probable cause
1) Piston Cooling Valve

Detailed information
1) Mechanical system not responding properly