Volvo

Conditions for diagnostic trouble code (DTC):
1) Cylinder misfires detected in multiple cylinders

Observable symptoms
1) Rough Idle
2) MIL Illuminated

Probable cause
1) Engine Fuel Injectors

Conditions for diagnostic trouble code (DTC):
1) Cylinder misfires detected in multiple cylinders

Observable symptoms
1) Rough Idle
2) MIL Illuminated

Probable cause
1) Engine Fuel Injectors

The Crankcase Pressure Sensor is used to detect crankcase pressure system failures. The sensor consists of a pressure sensitive diaphragm and amplifier. Crankcase pressure causes the sensor’s diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The engine control module (ECM) will set a diagnostic trouble code (DTC) if the sensor signal is not within predetermined limits. The ECM can also disable the engine brake, derate or shut down the engine to avoid engine damage.
The sensor’s signal is monitored by the Engine Control Module (ECM).

Conditions for diagnostic trouble code (DTC):
1) Crankcase pressure (CCP) too high
2) Electrical fault

Observable symptoms
1) Engine shutdown
2) The alarm sounds if the pressure is more than 5 kPa (0.73 psi)
3) Engine brake disabled
4) Low Power
5) Limited engine speed

Probable cause
1) High engine oil level
2) Excessive wear or damage to cylinder liners, piston, piston rings or turbocharger internal seals
3) Restricted crankcase ventilation
4) The following connectors may have been switched: B54: Crankcase pressure sensor, B118: Engine oil pressure (EOP) sensor

The Crankcase Pressure Sensor is used to detect crankcase pressure system failures. The sensor consists of a pressure sensitive diaphragm and amplifier. Crankcase pressure causes the sensor’s diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The engine control module (ECM) will set a diagnostic trouble code (DTC) if the sensor signal is not within predetermined limits. The ECM can also disable the engine brake, derate or shut down the engine to avoid engine damage.
The sensor’s signal is monitored by the Engine Control Module (ECM).

Conditions for diagnostic trouble code (DTC):
1) Too small difference in crankcase pressure

Observable symptoms
1) Limited engine speed

Probable cause
1) Separator
2) Leakage from hoses or connections
3) Damaged connections
4) Engine damage or wear
5) Low oil pressure

The Crankcase Pressure Sensor is used to detect crankcase pressure system failures. The sensor consists of a pressure sensitive diaphragm and amplifier. Crankcase pressure causes the sensor’s diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The engine control module (ECM) will set a diagnostic trouble code (DTC) if the sensor signal is not within predetermined limits. The ECM can also disable the engine brake, derate or shut down the engine to avoid engine damage.
The sensor’s signal is monitored by the Engine Control Module (ECM).

Observable symptoms
1) None

Probable cause
1) Connector
2) Wiring harness
3) Open circuit, Ground wire
4) Short circuit to battery voltage, Signal wire
5) Short circuit to 5V, Signal wire
6) Restricted crankcase ventilation
7) Crankcase pressure sensor
8) Engine control module (ECM)
9) Engine damage or wear

The Crankcase Pressure Sensor is used to detect crankcase pressure system failures. The sensor consists of a pressure sensitive diaphragm and amplifier. Crankcase pressure causes the sensor’s diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The engine control module (ECM) will set a diagnostic trouble code (DTC) if the sensor signal is not within predetermined limits. The ECM can also disable the engine brake, derate or shut down the engine to avoid engine damage.
The sensor’s signal is monitored by the Engine Control Module (ECM).

Observable symptoms
1) None

Probable cause
1) Connector
2) Wiring harness
3) Short circuit to ground, Signal wire
4) Open circuit, Supply wire
5) Open circuit, Signal wire
6) Crankcase pressure sensor
7) Engine control module (ECM)
8) Engine damage or wear

Detailed information
1) Yellow check lamp illuminated

The Crankcase Pressure Sensor is used to detect crankcase pressure system failures. The sensor consists of a pressure sensitive diaphragm and amplifier. Crankcase pressure causes the sensor’s diaphragm to deflect and produce an electrical signal proportional to the pressure. The diaphragm deflection signal is amplified in the sensor.
The engine control module (ECM) will set a diagnostic trouble code (DTC) if the sensor signal is not within predetermined limits. The ECM can also disable the engine brake, derate or shut down the engine to avoid engine damage.
The sensor’s signal is monitored by the Engine Control Module (ECM).

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A14.EB:28 is less than 0.3?V
2) Ignition key in ON position

Observable symptoms
1) None

Probable cause
1) Connector
2) Wiring harness
3) Crankcase pressure sensor
4) Engine control module (ECM)