Fuel Shutoff Valve Control Circuit Low
The P0006 code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the fuel shutoff valve control circuit. 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 voltage reading suggests a short to ground, open circuit, or faulty component in the circuit, which can prevent the valve from operating correctly, potentially causing the engine to stall or not start.
1. Most Common Causes
- High internal resistance or open coil in fuel shutoff valve 'A'
- Short to ground in the valve control circuit wiring
- Corroded or loose connections in the circuit connectors
- Faulty fuel shutoff valve control relay (if applicable)
- Blown fuse or excessive resistance in the power supply circuit
- Internal ECM/PCM failure in the circuit driver
- Excessive wiring resistance due to heat damage, chafing, or corrosion
2. Symptoms You Will Notice
- Engine stalls or fails to start
- Check Engine Light illuminated
- Reduced engine performance
- Fuel odor due to potential leakage
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for additional 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 near 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, ECM may be faulty.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The fuel shutoff valve may fail to operate, causing the engine to stall unexpectedly or not start, which can lead to a dangerous situation, especially in traffic.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the cause. Replacing the fuel shutoff valve itself is usually under $100, plus labor.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.