Volvo

The Boost Air Pressure Sensor is used to monitor the pressure of the air in the intake system after the turbocharger. The sensor consists of a pressure sensitive diaphragm/amplifier sensor. Air pressure causes the sensors diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The sensor signals are used to calculation fuel injection and is monitored by the Engine Control Module (ECM).
The engine control module (ECM) will set a diagnostic trouble code (DTC) and derate the engine to avoid engine damage if the sensor signal is not within predetermined limits, or the signal is not rational.

Conditions for diagnostic trouble code (DTC):
1) The sensor signal is not rational
2) Irrational pressure compared to atmospheric pressure and crankcase pressure

Observable symptoms
1) Low Power

Probable cause
1) Intake manifold air temperature (IMAT) and pressure sensor
2) Inlet and exhaust system

The Boost Air Pressure Sensor is used to monitor the pressure of the air in the intake system after the turbocharger. The sensor consists of a pressure sensitive diaphragm/amplifier sensor. Air pressure causes the sensors diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The sensor signals are used to calculation fuel injection and is monitored by the Engine Control Module (ECM).
The engine control module (ECM) will set a diagnostic trouble code (DTC) and derate the engine to avoid engine damage if the sensor signal is not within predetermined limits, or the signal is not rational.

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A14.EA:22 is less than 0.29?V

Observable symptoms
1) Low Power
2) The charge pressure gauge shows 0 in the instrument

Probable cause
1) Wiring harness
2) Intake manifold air temperature (IMAT) and pressure sensor

Detailed information
1) Pressure set to atmospheric pressure plus 30 kPa (4.5 psi)

The Boost Air Pressure Sensor is used to monitor the pressure of the air in the intake system after the turbocharger. The sensor consists of a pressure sensitive diaphragm/amplifier sensor. Air pressure causes the sensors diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The sensor signals are used to calculation fuel injection and is monitored by the Engine Control Module (ECM).
The engine control module (ECM) will set a diagnostic trouble code (DTC) and derate the engine to avoid engine damage if the sensor signal is not within predetermined limits, or the signal is not rational.

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A14.EA:22 is less than 0.29?V

Observable symptoms
1) Low Power
2) The charge pressure gauge shows 0 in the instrument

Probable cause
1) Wiring harness
2) Intake manifold air temperature (IMAT) and pressure sensor

Detailed information
1) Pressure set to atmospheric pressure plus 30 kPa (4.5 psi)

The Boost Air Pressure Sensor is used to monitor the pressure of the air in the intake system after the turbocharger. The sensor consists of a pressure sensitive diaphragm/amplifier sensor. Air pressure causes the sensors diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The sensor signals are used to calculation fuel injection and is monitored by the Engine Control Module (ECM).
The engine control module (ECM) will set a diagnostic trouble code (DTC) and derate the engine to avoid engine damage if the sensor signal is not within predetermined limits, or the signal is not rational.

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A14.EA:22 is less than 0.29?V

Observable symptoms
1) Low Power
2) The charge pressure gauge shows 0 in the instrument

Probable cause
1) Wiring harness
2) Intake manifold air temperature (IMAT) and pressure sensor

Detailed information
1) Pressure set to atmospheric pressure plus 30 kPa (4.5 psi)

The Boost Air Pressure Sensor is used to monitor the pressure of the air in the intake system after the turbocharger. The sensor consists of a pressure sensitive diaphragm/amplifier sensor. Air pressure causes the sensors diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The sensor signals are used to calculation fuel injection and is monitored by the Engine Control Module (ECM).
The engine control module (ECM) will set a diagnostic trouble code (DTC) and derate the engine to avoid engine damage if the sensor signal is not within predetermined limits, or the signal is not rational.

Conditions for diagnostic trouble code (DTC):
1) Charge pressure Low

Probable cause
1) Wiring harness
2) Intake manifold air temperature (IMAT) and pressure sensor

The Boost Air Pressure Sensor is used to monitor the pressure of the air in the intake system after the turbocharger. The sensor consists of a pressure sensitive diaphragm/amplifier sensor. Air pressure causes the sensors diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The sensor signals are used to calculation fuel injection and is monitored by the Engine Control Module (ECM).
The engine control module (ECM) will set a diagnostic trouble code (DTC) and derate the engine to avoid engine damage if the sensor signal is not within predetermined limits, or the signal is not rational.

Conditions for diagnostic trouble code (DTC):
1) Abnormal value : Low

Observable symptoms
1) Power loss
2) Black smoke

Probable cause
1) Wiring harness
2) Intake manifold air temperature (IMAT) and pressure sensor connector
3) Charge air system leakage

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) The turbocharger speed is more than the value needed for the observed intake manifold pressure

Observable symptoms
1) Intermittent power loss

Probable cause
1) Engine wiring harness
2) Incorrectly installed sensor
3) Turbo Speed Sensor
4) Charge air pressure sensor

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) The turbocharger speed is less than the value needed for the observed intake manifold pressure

Observable symptoms
1) Intermittent power loss

Probable cause
1) Engine wiring harness
2) Incorrectly installed sensor
3) Turbo Speed Sensor

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