Fault code P1229 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P1229 – Intercooler Pump Driver Fault

P1229: Causes, signs and repairs

Error code P1229 is displayed and the check engine light is on - what does this mean?

The DTC P1229 is a manufacturer-specific fault code that is recognized by the OBD system and indicates a problem with the fuel pump or the fuel pressure control system. This trouble code mainly occurs in Ford vehicles and indicates a fault in the fuel supply system. The EOBD system registers this fault code if the fuel pump is not working properly or the fuel pressure is outside the specified parameters.

What can cause this fault code?

Defective fuel pump
Clogged fuel filter
Damaged fuel pump relay
Defective fuel pressure regulator
Corroded or loose plug connections on the fuel pump
Blocked fuel lines
Defective fuel pressure sensor
Damaged wiring in the fuel pump circuit
Weak or defective fuel tank level sensor

What symptoms occur in parallel with fault code P1229?

Starting problems: The vehicle is difficult to start or does not start at all
Loss of power: Noticeable loss of engine power while driving
Jerking engine: Uneven engine running at idling speed or under load
Engine stalling: The engine suddenly stops while driving
Poor acceleration: Delayed or weak response when accelerating
Smell of fuel: Smell of fuel in or around the vehicle
Irregular idling: Engine runs unevenly or has fluctuating engine speeds

How to fix the problem of error code P1229?

Repairing fault code P1229 requires a systematic diagnosis of the fuel system.
Replace the fuel pump completely, including installing a new pump in the fuel tank and checking the electrical connections
Replace the fuel filter and also check the fuel lines for blockages or damage
Replace the fuel pump relay and test the relay function with a multimeter
Replace the fuel pressure regulator and then check the system pressure with a pressure gauge
Completely check and repair the wiring in the fuel pump circuit, including cleaning corroded contacts
Replace fuel pressure sensor and recalibrate the entire fuel pressure management system

FAQ - Frequently asked questions about DTC P1229

Can I continue driving with fault code P1229?

Continuing to drive with the code P1229 is not recommended as it can lead to complete engine failure. The fault code indicates problems with the fuel supply, which can jeopardize safe driving.

How much does it cost to repair fault code P1229?

The repair costs for DTC P1229 vary between €150 and €800, depending on the cause. A new fuel filter costs around €30-80, while a complete fuel pump can cost between €200-500, plus labor.

Is trouble code P1229 a serious problem?

Yes, trouble code P1229 is a serious problem as it affects the fuel supply to the engine. Without a proper fuel supply, the engine can be damaged or fail completely.

Can I repair trouble code P1229 myself?

Simple repairs such as changing the fuel filter or relay can be carried out by yourself. However, replacing the fuel pump requires specialist knowledge and should be carried out by a workshop.

How long does it take to repair error code P1229?

The repair time depends on the cause. Replacing a fuel filter takes around 30-60 minutes, while replacing a fuel pump can take 2-4 hours.

Will error code P1229 return after the repair?

After a proper repair, fault code P1229 should not return. If it does, this indicates an incomplete diagnosis or other defective components in the fuel system.

Vehicles in which fault code P1229 occurs most frequently

Error code P1229 is a manufacturer-specific DTC that mainly occurs in Ford vehicles and indicates problems with the fuel supply system, but is most common in the following vehicles:

Ford: Focus, Fiesta, Mondeo, Escort, Ka, Puma (1995-2010)
Mazda: 323, 626, Premacy, Demio (1996-2005)
Volvo: S40, V40, S70, V70 (1996-2004)
Jaguar: X-Type, S-Type (2001-2009)
Land Rover: Freelander, Discovery (1998-2006)
If the code P1229 occurs in your vehicle, you should first have the fuel pressure checked and the fuel system thoroughly diagnosed. As this error code can affect driving safety, it is advisable to have it repaired promptly at a specialist workshop. Most problems can be rectified by replacing the fuel pump or fuel filter, but a professional diagnosis is essential to identify the exact cause.

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