COUPLER AS-QUICK 4755066 - Caterpillar

The Electronic Control Module (ECM) detects the following conditions:
The signal voltage for the pressure in the fuel rail is more than 4.8 Volts DC for 0.6 seconds.System Response:The warning light on the control panel will flash. The ECM will log the diagnostic code. The electronic service tool will display "70000 kPa" next to "Desired Fuel Rail Pressure" and "Actual Fuel Rail Pressure" on the status screens.Possible Performance Effect:The engine will be derated.Troubleshooting:This code can be caused by a loss of reference ground, an open signal wire or a short to a voltage source.Test Step 1. Perform the following diagnostic procedure: "Engine Pressure Sensor Open or Short Circuit - Test"Results:
OK - STOP