Fault code P1220 – a step-by-step guide to diagnosing and fixing it

Error code P1220 is displayed and the check engine light is on - what does this mean?

The DTC P1220 is a manufacturer-specific fault code that is recognized by the OBD system and indicates a problem with the fuel system or the injection system. This trouble code mainly occurs in Ford vehicles and indicates a fault in the fuel pressure system or the fuel pump.

What causes can this error code have?

• Defective fuel pump
• Clogged fuel filter
• Damaged fuel pressure control valve
• Defective fuel pressure sensor
• Blocked fuel lines
• Electrical problems in the fuel pump circuit
• Loose or corroded plug connections
• Defective fuel pump relay
• Dirty fuel tank
• Damaged wiring to the fuel system

What symptoms occur in parallel with fault code P1220?

• Starting problems: The vehicle is difficult or impossible to start
• Loss of power: Noticeable reduction in engine power while driving
• Jerking engine: Unsteady engine running, especially when idling
• Stuttering engine: Engine runs unevenly at different engine speeds
• Stalling: Engine stalls while driving or when stationary
• Poor acceleration: Delayed response when accelerating
• Increased fuel consumption: Significantly higher consumption than usual

How to fix the problem of fault code P1220?

• Repairing fault code P1220 requires a systematic diagnosis of the fuel system.
• Replace the fuel pump completely, including checking the electrical connections and installing a new OEM pump
• Replace the fuel filter and check the entire fuel system for contamination, then flush the system
• Replace fuel pressure control valve and recalibrate fuel pressure in the system
• Replace fuel pressure sensor and reprogram with diagnostic device
• Completely check and clean all fuel lines, replace defective lines if necessary
• Completely check the electrical wiring of the fuel system, repair damaged cables and clean all plug connections
• Replace fuel pump relay and check fuses in the fuel system circuit