Fault code P0002 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P0002 – Fuel Volume Regulator Control Circuit Range/Performance

P0002: Causes, signs and repairs

Error code P0002 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system detects a fault in the fuel volume control system, specifically "Fuel Volume Regulator Control Circuit/Open". This DTC P0002 indicates a problem with the fuel volume regulator or its control circuit, which can affect the fuel supply to the engine.

What can cause this error code?

Defective fuel volume regulator
Damaged or interrupted cable to the fuel pressure regulator
Loose or corroded plug connections in the fuel system
Faulty fuel pump or fuel pump relay
Faulty engine control unit (ECU)
Clogged fuel filter
Low fuel pressure conditions
Electrical short circuits in the fuel system

What symptoms occur in parallel with fault code P0002?

Starting problems: The vehicle is difficult to start or does not start at all
Uneven idling: The engine runs unevenly at idle speed
Loss of power: Reduced engine power, especially under load
Jerking when accelerating: Uneven fuel supply causes jerking
Increased fuel consumption: The system operates inefficiently
Stalling of the engine: Sudden shutdown possible while driving

How can the problem of error code P0002 be resolved?

The elimination of this trouble code requires a systematic approach to identify the exact cause.
Check and replace the fuel volume regulator: Test the regulator for proper function using a multimeter and replace it if defective (costs: €150-400)
Check and repair the electrical connections: Inspect all wires and connectors to the fuel system, clean corroded contacts or replace damaged wires
Fuel pressure test and pump maintenance: Measure the fuel pressure in the system and replace the fuel pump or pump relay if necessary (costs: €200-600)
Fuel filter replacement: Replace the fuel filter, as blockages can lead to pressure problems (costs: €30-80)
Diagnosis of the engine control unit: Have the ECU professionally tested and reprogrammed or replaced if necessary (costs: €500-1500)

FAQ - Frequently asked questions about DTC P0002

Can I continue driving with error code P0002?

Short distances are possible, but not recommended. Fault code P0002 can lead to sudden engine failure, which is particularly dangerous in traffic. Visit a workshop as soon as possible.

How much does it cost to repair fault code P0002?

Depending on the cause, the repair costs vary between €50 (simple cable repair) and €1500 (ECU replacement). The most common cost is between 200-500€ for fuel components.

Can I repair error code P0002 myself?

Simple checks such as fuses or plug connections are possible. However, work on the fuel system requires specialist knowledge and special tools. Have more complex repairs carried out by a specialist.

How often does DTC P0002 occur?

This code is relatively rare and mainly occurs in older vehicles with a mileage of over 150,000 km. Diesel vehicles with common-rail systems are more frequently affected.

What diagnostic equipment do I need for P0002?

A standard OBD2 scanner is sufficient for code recognition. For troubleshooting, you will also need a multimeter and ideally a fuel pressure gauge. Professional diagnostic devices offer extended functions.

Is error code P0002 a serious problem?

Yes, this eobd code should be taken seriously. Problems in the fuel system can lead to engine damage and impair driving safety. Prompt diagnosis and repair is important.

Vehicles in which error code P0002 occurs most frequently

Fault code P0002 is a fuel-related diagnostic code and can affect various vehicle manufacturers, but is most common in the following vehicles:

Ford: Focus, Fiesta, Mondeo, Transit (2005-2015)
Volkswagen: Golf, Passat, Touran, Caddy (2004-2014)
Opel: Astra, Corsa, Vectra, Zafira (2003-2013)
BMW: 3 Series, 5 Series, X3, X5 (2006-2016)
Mercedes-Benz: C-Class, E-Class, Sprinter, Vito (2005-2015)
Audi: A3, A4, A6, Q5 (2005-2014)
Peugeot: 307, 308, 407, Partner (2004-2014)
Renault: Megane, Scenic, Laguna, Kangoo (2003-2013)

If code P0002 occurs in your vehicle, you should first consult the vehicle documentation, as some manufacturers recommend specific repair procedures. The use of original spare parts is particularly important for fuel system components in order to avoid further problems. If the code recurs after the repair, a more in-depth system analysis by a specialist workshop is required.

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