There are 3 likely reasons that this fault may appear:
1. Cable problem
2. Sensor problem
3. Connector loose inside the CPIM
1. Cable Problem - Investigations
* Check for cuts or breaks in the cable
* Check for damage inside each 4 pin screw connector
* With a continuity tester, check continuity of each cable run between the cable connectors
* Check that the screw connectors are screwed in tight at both the CPIM connector and the Sensor connector
2. Sensor Problem - Investigations
* If a spare sensor is available then try replacing the Compensation Rod Pressure Sensor
* If a spare sensor isn't available then try swapping with a different sensor in the system and see if the fault follows the sensor