Common Rail High Pressure Pump Regulator Control
Table of contents
P0251 DODGE Possible Causes
- Faulty Electronic Fuel Control Actuator
- Electronic Fuel Control Actuator harness is open or shorted
- Electronic Fuel Control Actuator circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How do I fix code P0251 DODGE?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0251 DODGE code
The cost of diagnosing the P0251 DODGE code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0251 DODGE Description
The Fuel Control Actuator (FCA) is an electronically controlled solenoid valve. The Engine Control Module (ECM) controls the amount of fuel that enters the high-pressure pumping chambers by opening and closing the FCA based on a demanded fuel pressure. When the FCA is opened, the maximum amount of fuel is being supplied to the fuel injection pump. Any fuel that does not enter the injection pump is directed to the cascade overflow valve. The cascade overflow valve regulates how much excess fuel is used for the lubrication of the pump and how much is returned to the fuel tank through the drain manifold. An audible click from the FCA is normal when operating the key from the ON to the OFF position.
The Diagnostic Trouble Code (DTC) will set when the ECM detects a discrepancy between the PWM supplied to the Electronic Fuel Control Actuator and the PWM returned from the Electronic Fuel Control Actuator.