FAN GP-SUCTION 4160664 - Caterpillar

The Electronic Control Module (ECM) detects one of the following conditions:
The actual injection actuation pressure and the desired injection actuation pressure differ by more than 3 MPa (435 psi).
The current to the injection actuation pressure control valve is at either the maximum output or the minimum output for an excessive period of time. Note: The diagnostic code indicates a mechanical problem. The ECM and the electronic control system are operating correctly.System Response:The ECM will log the diagnostic code. The diagnostic code may be viewed on a display module or on the Caterpillar Electronic Technician (ET).Possible Performance Effect:
Low power
Unstable idle
Difficult to start at normal operating temperatures
Easy to start below normal operating temperaturesTroubleshooting:Note: The problem may only exist at operating temperature. Air may be trapped in the injection actuation system if the system has been serviced recently. Start the engine and run the engine at 1500 rpm for a few minutes in order to remove the trapped air.Test Step 1. Perform the following diagnostic procedure: "Injection Actuation Pressure - Test"Results:
OK - STOP