VOLVOUU All Engines (2010 Emissions) Fault Code: SPN 153 FMI 0 PID: PSID 23 Engine High Resolution Crankcase 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).

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