Fuel Shutoff Valve Control Circuit High
The P2667 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the control circuit of the fuel shutoff valve. This valve is responsible for cutting off fuel flow to the engine in certain conditions, such as during a collision or when the ignition is off. A high voltage reading typically points to a short to power, a faulty valve, or an issue with the wiring or connectors.
1. Most Common Causes
- Short circuit to battery voltage (B+) in the control signal wiring for valve 'B'
- Internal short to positive within the fuel shut-off valve 'B' solenoid
- Faulty PCM low-side driver (output driver)
- Corroded connectors or damaged terminals causing contact with power circuits
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine may not start or stalls unexpectedly
- Reduced fuel efficiency
- Engine runs rough or lacks power
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the fuel shutoff valve and its wiring for damage, corrosion, or loose connections.
Step 3: Test the control circuit voltage with a multimeter to identify a short to power.
Step 4: Check the fuel shutoff valve resistance and compare to manufacturer specifications.
Step 5: If necessary, replace the fuel shutoff valve or repair the wiring as needed.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The fuel shutoff valve may malfunction, causing the engine to stall or not start, which can be dangerous while driving.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the cause and vehicle model.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.