What does the P0006 fault code mean?
The P0006 fault code applies to all car manufacturers and means “Fuel Shutoff Valve A Control Circuit Low“.
Background: The fuel cut-off valve’s function is to cut off the fuel supply to the engine in the event of an emergency (such as a rollover). This fault code indicates that the electronic control unit (ECU) has detected that the voltage in the fuel cut-off valve A control circuit is below the calibrated minimum value.
Symptoms of P0006 Error Code
When error P0006 occurs, the vehicle may exhibit the following symptoms:
- Difficulty starting the engine
- Loss of power while driving
- Increased fuel consumption
- Unstable engine idling
- Engine malfunction light on the dashboard
- Vehicle entering emergency mode (power reduction mode)
Important! Error P0006 can be caused by mechanical and electrical problems. Diagnosis requires examining all components related to fuel supply.
Main Causes of P0006 Error Code
- Open or short circuit in the fuel shut-off valve control circuit
- Faulty fuel shut-off valve itself
- Damaged connector or corroded contacts
- Faulty engine control module (ECM/PCM)
- Problem with the fuel pressure sensor or fuel system controller
P0006 Error Codes in Different Vehicles
- Audi P0006: Models equipped with diesel engines, especially TDI, are prone to P0006 errors due to the design of the fuel shut-off system. It is usually related to valve wear.
- Volkswagen P0006: Volkswagen vehicles equipped with 2.0 TDI engines often experience valve control circuit failures due to contact point vibration and oxidation. Connectors need to be checked regularly.
- P0006 in Mercedes-Benz: In E-Class and Sprinter diesel models, error P0006 may indicate a fuel management module malfunction. Check not only the valves but also the fuel rail.
- P0006 in Ford: In diesel engine models (such as the Transit), the problem is usually caused by a valve malfunction or damaged wiring. Sometimes replacing the relay can help.
- P0006 in BMW: On diesel models, the error may be caused by a software malfunction in the DDE module. The fuel supply solenoid valve may also be faulty.
How to diagnose P0006 error code?
Step 1: Connect an OBD2 scanner to the vehicle’s diagnostic interface and read all stored error codes.
Step 2: Clear the error code and see if it reappears after starting the engine.
Step 3: Check the circuitry of the fuel cut-off valve—from the relay to the valve itself.
Step 4: Visually inspect the connectors and wiring for damage or corrosion.
Step 5: Measure the voltage and resistance at the valve contacts. Compare with factory specifications.
Possible Causes and Diagnostic Methods
| Possible Causes | How to Check？ |
|---|---|
| Open Circuit | Check the integrity of the circuit with a multimeter |
| Short Circuit | Check the resistance of the valve contacts |
| Valve Failure | Connect the valve directly to the power supply and check the response |
| Connector Damage | Visual inspection and contact cleaning |
| PCM/ECM Failure | Scan for error codes and check firmware and controller status |
Required Tools: OBD2 scanner, digital multimeter, automotive circuit diagram, dielectric grease (for cleaning connectors), a set of wrenches and screwdrivers
How to resolve P0006 error code? (Solutions to the Problem)
Simple Handling Methods
- Reset the error code after initial diagnosis.
- Clean and reinstall all electrical connectors.
- Replace damaged or oxidized contacts.
- Visually inspect and insulate bare wires.
In-depth Diagnostic and Repair Solutions
- Replace the fuel shut-off valve.
- Inspect and replace the valve control relay.
- Check or replace the engine control module (ECM).
- Full diagnostics of the fuel supply system.
Troubleshooting Through Symptoms
| Symptoms | Possible Solutions |
|---|---|
| Engine won’t start | Check the fuel shut-off valve and relay |
| Increased fuel consumption | Fuel management diagnostics |
| Unstable engine operation | Valve replacement, wiring check |
| Emergency mode | Error reset, control module check |
Frequently Asked Questions about P0006 Errors
Can you drive a car with the P0006 error code?
Not recommended, as error P0006 indicates a problem with the fuel supply system. This can cause reduced power, engine vibration, or even stalling while driving.
Is the P0006 error related to a broken fuel shut-off valve?
Yes, one of the common causes of the P0006 error is a faulty fuel shut-off valve. It may be damaged or malfunctioning due to wear or contamination.
Can I resolve error P0006 myself?
Yes, with basic knowledge and tools, you can diagnose and rule out simple causes, such as cleaning contacts or replacing damaged wires. However, for complex cases, it is recommended to consult a specialist.
Error P0006 occurs occasionally. Can I ignore it?
No, even irregular errors indicate an unstable fuel supply system. A comprehensive diagnosis is necessary to avoid serious consequences.
Will error P0006 reset after replacing the valve?
After replacing the valve, it is recommended to use an OBD2 scanner to clear the error code. If the problem is resolved correctly, the code will no longer appear.
Tip: Other fault codes related to the Fuel Cut-off Valve A control circuit include: P0005, P0007.