BOLT 1A8651 - Caterpillar

Conditions Which Generate This Code:This code indicates that the 5 volt supply is missing from the sensor connector.During normal engine operation, the oil pressure fluctuates slightly. When the 5 volt supply is missing from the oil pressure sensor, the signal from the oil pressure sensor goes to a midrange value. The signal does not fluctuate. If the signal from the oil pressure sensor remains abnormally steady for more than 30 seconds, the Engine Control Module (ECM) activates this code.System Response:A snapshot is triggered. The ECM uses a default value for the oil pressure.Possible Performance Effect:
There are no performance effects.TroubleshootingTest Step 1. Repair the Open Circuit
Repair the supply wire or replace the supply wire between the ECM and the sensor. Expected Result:The problem is resolved.Results:
OK - The problem is resolved.SOP
Not OK - The problem is not resolved.Repair: Refer to the diagnostic functional test Troubleshooting, "5 Volt Engine Pressure Sensor Supply Circuit - Test".STOP