Volvo All Engines (2004 Emissions) Fault Code: PID 153 FMI 3 Crankcase Pressure Sensor

Fault Condition: The Electronic Malfunction Lamp (EML) will illuminate when the Crankcase Pressure (CP) Sensor signal line voltage is less than 0.3 volts or greater than 4.75 volts. If the signal line voltage is between 0.3 volts and 4.75 volts the fault will become inactive.

Possible repairs:

Turn the ignition key OFF first.

1) Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 2 (signal line) and a good ground. If continuity exists, locate and repair the short circuit to ground.
2) Disconnect EMS Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 1 (reference voltage line) and EMS Module harness connector B pin 17. If there is NO continuity, repair the open in the harness reference voltage line.
3) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect EMS Module connectors A and B. Check for continuity between EMS Module harness connector B pin 28 (signal line) and all other pins in EMS Module harness
connectors A and B. Visually check EMS Module connector B pin 28 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the signal line. If there is NO continuity or visual short, replace the EMS Module.
4) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 2 (signal line) and EMS Module harness connector B pin 28. If there is NO continuity, repair the open in the harness signal line.
5) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connectors A and B. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 17 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line.
If there is NO continuity or visual short, replace the EMS Module.
6) Disconnect Engine Management System (EMS) Module connectors A and B. Disconnect the Crankcase Pressure (CP) Sensor. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 17 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line.
If there is NO continuity or visual short circuit, replace the EMS Module.
7) Visually inspect both sides of the Crankcase Pressure (CP) Sensor connector for a repairable open. If there is a repairable fault or any of the pins feel loose, repair or replace the connector.
8) Disconnect Engine Management System (EMS) Module connectors A and B. Disconnect the Crankcase Pressure (CP) Sensor. Check for continuity between EMS Module harness connector B pin 18 (ground line)
and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 18 for a short circuit. If continuity exists or if there is a visual short circuit, repair the short to the return line. If there is NO continuity or visual short circuit, replace the EMS Module.
9) Visually inspect both sides of the Crankcase Pressure (CP) Sensor connector for a repairable open. If there is a repairable fault or any of the pins feel loose, repair or replace the connector.
10) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 4 (ground line) and EMS Module harness connector B pin 18. If there is NO continuity, repair the open in the harness ground line.
11) Remove the Crankcase Pressure (CP) Sensor. Connect the Crankcase Pressure (CP) Sensor to a regulated air supply with an accurate atmospheric pressure gauge. Connect a jumper wire between Crankcase Pressure (CP) Sensor pin 1 and pin 1 on the sensor harness connector. Connect a jumper wire between Crankcase Pressure (CP) Sensor pin 4 and a good ground. Turn the ignition key ON.
If the Crankcase Pressure (CP) Sensor output is correct throughout the entire pressure range, reinstall the sensor and replace the EMS Module.
If the Crankcase Pressure (CP) Sensor output is NOT correct throughout the entire pressure range, replace the Crankcase Pressure (CP) Sensor and recheck the system.
12) Visually inspect both sides of EMS Module connector B pin 18 for a repairable open in the ground line. If a repairable open is found, repair or replace EMS Module harness connector B. If the pins are making good contact, replace the EMS Module.