Volvo All Engines (2010 Emissions) Fault Code: SPN 153 FMI 7 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) Too small difference in crankcase pressure
Probable cause
1) Separator
2) Leakage from hoses or connections
3) Damaged connections
4) Low oil pressure
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