Fault code P1256 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P1256 – Pedal Correlation PDS1 and HPDS

P1256: Causes, signs and repairs

Error code P1256 is displayed and the check engine light is on - what does this mean?

The DTC P1256 is a manufacturer-specific fault code that is recognized by the OBD system and typically indicates problems with the fuel pump control or the fuel pressure regulator. This code mainly occurs in Ford vehicles and indicates a fault in the fuel system that can affect engine performance.

What can cause this fault code?

Defective fuel pump
Damaged fuel pressure regulator
Clogged fuel filter
Defective fuel pump relay
Damaged wiring to the fuel pump
Loose or corroded plug connections
Defective fuel pressure sensor
Blocked fuel lines
Faulty engine control unit (ECU)

What symptoms occur in parallel with fault code P1256?

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

How to fix the problem of trouble code P1256?

Repairing trouble code P1256 requires a systematic diagnosis of the fuel system.
Replace the fuel pump completely and check the electrical connections
Replace the fuel pressure regulator and carry out a pressure test
Replace fuel filter and check fuel lines for blockages
Replace fuel pump relay and check fuses
Completely check the wiring to the fuel system and replace damaged cables
Replace the fuel pressure sensor and have it calibrated
Diagnose engine control unit and reprogram if necessary

FAQ - Frequently asked questions about DTC P1256

Can I continue driving with error code P1256?

It is not recommended to continue driving with code P1256, as fuel system problems can lead to engine damage. In the event of acute symptoms such as stalling, you should stop the vehicle immediately.

How much does it cost to repair error code P1256?

The repair costs for EOBD error code P1256 vary depending on the cause: fuel filter 50-80€, fuel pump 200-500€, pressure regulator 100-250€. A complete diagnosis costs around €80-120.

How can I diagnose fault code P1256 myself?

Use an OBD diagnostic device to read and delete the code. Check the fuel pressure with a pressure gauge and check all fuses and relays in the fuel system.

Is the error code P1256 the same for all manufacturers?

No, P1256 is a manufacturer-specific DTC that mainly occurs with Ford. Other manufacturers use different codes for similar fuel system problems.

How long does it take to repair the P1256 code?

Depending on the cause, the repair will take 1-4 hours. A simple filter change can be done in 30 minutes, while replacing the fuel pump can take several hours.

Can bad fuel cause error code P1256?

Yes, contaminated or old fuel can cause blockages in the system and thus trigger fault code P1256. Always use high-quality fuel and additives to clean the system.

Vehicles in which fault code P1256 occurs most frequently

Fault code P1256 is a manufacturer-specific code that mainly indicates fuel system problems and can occur in various vehicle models, but is most common in the following vehicles:

Ford: Focus, Fiesta, Mondeo, Galaxy, S-Max, C-Max, Kuga (1998-2015)
Mazda: 3, 6, CX-5, CX-7, MX-5 (2003-2014)
Volvo: S40, V50, C30, S60, V70, XC60 (2004-2016)
Land Rover: Freelander, Discovery, Range Rover Evoque (2002-2013)
Jaguar: X-Type, S-Type, XF (2001-2012)

If the code P1256 occurs in your vehicle, you should first have a thorough diagnosis of the fuel system carried out. As this is a manufacturer-specific code, it is important to follow the vehicle-specific repair instructions. An early repair prevents costly consequential damage to the engine and ensures the operational safety of your vehicle.

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