[amidgeha]

Fuel Pressure Regulator 1 Control Circuit/Open

The Engine Control Module (ECM) uses commanded fuel pump flow to determine a desired fuel rail pressure. The actual fuel pressure is monitored using the Fuel Rail Pressure (FRP) Sensor.

Cause:
Faulty fuel pressure sensor
Fuel pressure sensor harness is open or shorted
Fuel pressure sensor electrical circuit poor connection
Faulty Engine Control Module (ECM)

Symptoms:
Check engine light