Fuel Shutoff Valve Control Circuit Low
The P0006 code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the control circuit of the fuel shutoff valve. This valve is responsible for cutting off fuel flow to the engine when the ignition is turned off or in certain safety conditions. A low circuit voltage suggests a short to ground, open circuit, or faulty component, which can prevent the valve from operating correctly, potentially causing the engine to stall or not start.
01. Most Common Causes
- Faulty fuel shutoff valve
- Short to ground in the control circuit wiring
- Open circuit in the control circuit wiring
- Corroded or damaged connector at the fuel shutoff valve
- Failed ECM (rare)
02. Symptoms You Will Notice
- Engine stalls or fails to start
- Check Engine Light illuminated
- Engine may run rough or hesitate
- No start condition
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify the code and check for other related codes.
Step 2: Visually inspect the fuel shutoff valve connector and wiring for damage, corrosion, or loose connections.
Step 3: Measure voltage at the fuel shutoff valve connector with the ignition on; should be battery voltage. If low, check for shorts or opens.
Step 4: Test the fuel shutoff valve resistance with a multimeter; compare to manufacturer specifications.
Step 5: If wiring and valve are okay, test the ECM output circuit; if no voltage, suspect ECM failure.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The fuel shutoff valve may fail, causing the engine to stall unexpectedly, which can lead to a loss of power steering and brakes, increasing the risk of an accident.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, including parts and labor. The fuel shutoff valve itself is usually inexpensive, but labor costs vary by shop.