P0006
UniversalFuel Shutoff Valve Control Circuit Low
The engine computer has detected a low electrical condition in the fuel shutoff valve control circuit. This circuit controls a valve that can regulate or stop fuel flow. Depending on the vehicle and the fault, the engine may have trouble starting or running, or there may be no noticeable symptoms. The code identifies a detected circuit condition; it does not by itself prove the valve needs replacement.
⚠️ Before You Begin (Safety First)
If the engine stalls, will not start reliably, or loses power in traffic, stop driving when it is safe and arrange diagnosis. Do not work on fuel lines or wiring near fuel leaks; have a suspected leak checked promptly. Exact procedures depend on the vehicle.
Common Symptoms
- There may be no noticeable symptoms if the circuit condition does not prevent normal fuel control.
- The engine may crank but be difficult or impossible to start if the valve is not being controlled as needed.
- The engine may stall or run poorly if fuel flow is disrupted by the circuit fault.
- A warning light may appear when the vehicle detects the circuit condition.
Common Causes
- Damaged, corroded, or poorly connected wiring or terminals may affect the control circuit.
- A short to ground or another circuit fault may cause the circuit reading to be low, depending on the vehicle's design.
- A problem with the valve's electrical coil or internal connections may affect the circuit.
- A power, ground, or control-module problem may prevent the circuit from operating as intended.
Diagnostic Steps
- Note whether the engine starts, stalls, or runs differently, and record any other warning lights or symptoms to help guide diagnosis.
- Use a compatible scan tool to check for related codes and save available code details before clearing anything.
- With the vehicle off and cool, visually inspect accessible wiring and connectors for damage, corrosion, loose fit, or signs of rubbing; do not pull on wires or disconnect components unless the vehicle's service information says it is safe.
- Check the vehicle's service information for the correct valve and circuit before attempting further testing; avoid probing unfamiliar circuits or applying power directly to the valve.
- If the wiring checks do not reveal an obvious issue, have the circuit tested using vehicle-specific procedures rather than replacing the valve based on the code alone.
When to Call a Professional
A technician can check for related codes and scan data, then use the vehicle-specific wiring diagram to test the control circuit and its connections. Where supported, they can command the valve and compare circuit behavior with the command, while checking the valve and control-module circuits before deciding which part, if any, has failed.
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Commonly Asked Questions
Does P0006 prove the fuel shutoff valve is bad?
No. It reports a low condition in the valve control circuit. Wiring, connections, power or ground, the valve, or its control may need to be checked before identifying the cause.
Can the vehicle still be driven with this code?
It may run normally, but fuel control could be affected. If the engine stalls, loses power, or becomes difficult to start, stop driving when safe and arrange diagnosis.
What does “circuit low” mean here?
The vehicle detected an electrical condition below the expected range for the fuel shutoff valve control circuit. The exact circuit behavior and test procedure depend on the vehicle.
Could there be no symptoms?
Yes. A detected circuit issue may not noticeably affect how the vehicle runs, though it should still be diagnosed to determine whether fuel control could be affected.
Related Diagnostic Video
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