Fault code P0003 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P0003 – Fuel Volume Regulator Control Circuit Low

P0003: Causes, signs and repairs

Error code P0003 is displayed and the check engine light is on - what does this mean?

The OBD system detects low fuel pressure in the fuel supply system, specifically in the fuel pressure regulator control circuit. This DTC P0003 indicates problems with the fuel supply, which can lead to engine performance problems.

What can cause this fault code?

Defective fuel pump
Clogged fuel filter
Damaged fuel pressure regulator
Defective electrical connections in the fuel system
Clogged fuel injectors
Leaking fuel lines
Faulty fuel pressure sensors
Defective fuel pump relays
Clogged fuel tank vent filter

What symptoms occur in parallel with fault code P0003?

Starting problems: The vehicle is difficult or impossible to start
Loss of power: Noticeable reduction in engine power while driving
Uneven idling: Engine runs unevenly at idle speed
Jerking: Vehicle jerks, especially when accelerating
Stalling of the engine: Engine stalls while driving
Increased fuel consumption: Significantly higher consumption than usual
Black smoke: Dark exhaust fumes from the exhaust pipe

How to fix the problem of error code P0003?

The repair requires a systematic diagnosis of the fuel system, starting with checking the fuel pressure.
Replace the fuel pump: Completely replace defective fuel pump in the tank or on the fuel line, including seals and connections
Replace fuel filter: Replace the clogged fuel filter with a new filter and check the fuel lines for contamination at the same time
Repair fuel pressure regulator: Remove defective pressure regulator and replace with new part, check and replace vacuum hoses
Repair electrical connections: Check all plug connections, cables and relays in the fuel system for corrosion and damage and repair them
Clean fuel injectors: Professionally clean clogged injectors or replace them completely if they are very dirty
Seal fuel lines: Locate leaks in the fuel lines and repair them with new lines or seals

FAQ - Frequently asked questions about DTC P0003

Can I continue driving with error code P0003?

Continuing to drive with this trouble code is not recommended, as the engine can fail at any time. At the first sign of trouble, you should visit a workshop to avoid consequential damage.

How much does it cost to repair error code P0003?

The repair costs vary depending on the cause: changing the fuel filter costs 50-150 euros, a new fuel pump 300-800 euros, and cleaning the injectors around 150-300 euros. A complete diagnosis costs an additional 80-120 euros.

How can I diagnose fault code P0003 myself?

You can read out the fault code with an OBD scanner. First check the fuel pressure with a pressure gauge and visually check all fuel lines for leaks.

Is fault code P0003 the same for all vehicle brands?

Yes, P0003 is a standardized EOBD code that has the same meaning for all manufacturers. However, the specific repair procedures may vary depending on the vehicle model.

Can poor quality fuel cause fault code P0003?

Contaminated or poor quality fuel can certainly lead to this DTC, especially if it clogs filters or injectors. A fuel change and system cleaning can help.

How often does error code P0003 occur?

This code is relatively common, especially in vehicles with higher mileage. Regular maintenance of the fuel system can significantly reduce its occurrence.

Vehicles in which error code P0003 occurs most frequently

Error code P0003 is a common DTC in the fuel system and can occur in various vehicle brands, but is most common in the following vehicles:

Volkswagen: Golf, Passat, Polo, Tiguan (2005-2018)
Audi: A3, A4, A6, Q5 (2004-2017)
BMW: 3 Series, 5 Series, X3, X5 (2006-2019)
Mercedes-Benz: C-Class, E-Class, A-Class, GLC (2007-2020)
Ford: Focus, Mondeo, Fiesta, Kuga (2008-2019)
Opel: Astra, Corsa, Insignia, Zafira (2009-2018)
Renault: Megane, Clio, Scenic, Kadjar (2010-2020)
Peugeot: 308, 508, 2008, 3008 (2011-2019)

If the code P0003 occurs in your vehicle, you should first have a thorough diagnosis carried out. Many garages offer a free error code readout. In older vehicles with high mileage, preventive maintenance of the fuel system is often useful to avoid such problems. Remember that an early repair is usually cheaper than waiting for a complete system failure.

How to change front wheel bearing on MERCEDES-BENZ M W163 TUTORIAL | AUTODOC

151K views

Published on: 26/07/2018
How to change fuel filter BMW 3 (E90) [TUTORIAL AUTODOC]

241K views

Published on: 17/04/2019
How to change Front wheel bearing on VW GOLF 4 TUTORIAL | AUTODOC

177K views

Published on: 26/07/2018
How to change a rear brake pads FORD FOCUS 3 TUTORIAL | AUTODOC

169K views

Published on: 27/07/2018
How to change pollen filter / cabin filter on AUDI A6 (C6) [TUTORIAL AUTODOC]

150K views

Published on: 25/10/2019
How to change engine thermostat on PEUGEOT 207 [TUTORIAL AUTODOC]

147K views

Published on: 09/12/2020
How to change fuel filter NISSAN X-TRAIL T30 TUTORIAL | AUTODOC

139K views

Published on: 27/07/2018
How to change front wheel bearing TOYOTA YARIS XP10 TUTORIAL | AUTODOC

120K views

Published on: 26/07/2018

How to change serpentine belt on MERCEDES-BENZ A-Class (W169) – replacement guide

Free download PDF
1.38 MB
How to change engine oil and filter on BMW 1 Hatchback (F20) – replacement guide

Free download PDF
1.62 MB
How to change engine thermostat on VW Golf VI Hatchback (5K1) – replacement guide

Free download PDF
4.12 MB
How to change water pump & timing belt kit on Ford Fiesta JA8 – replacement guide

Free download PDF
7.83 MB
How to change front strut mount on AUDI A1 Hatchback (8X1, 8XK) – replacement guide

Free download PDF
3.8 MB
How to change water pump & timing belt kit on Peugeot 307 SW – replacement guide

Free download PDF
7.01 MB

Want to get more useful information?

Ask questions or share your repair experience on the car forum. Subscribe to updates so you don't miss out on new guides.

Ask on the forum

How to Install a New Windscreen Yourself | AUTODOC Expert Tips

10K views

Published on: 06/06/2024
Prevent Breakdowns: Key Car Checks After Winter | AUTODOC Guide

3K views

Published on: 23/03/2023
How to Polish Your Car Yourself and Save Money on Garage Services | AUTODOC tips

6K views

Published on: 31/03/2022
TOP 8 mistakes car owners make | AUTODOC tips

14K views

Published on: 09/12/2021