Fuel Shutoff Valve A Control Circuit High
Diagnostic trouble code P0007 indicates that the engine control module (ECM) has detected an unexpectedly high electrical voltage in the control circuit for fuel shutoff valve A. This typically occurs when there is a short to power in the wiring or a failure within the valve's internal solenoid.
This code is highly urgent because a malfunctioning fuel shutoff valve can completely cut off fuel to the engine. This will likely result in the vehicle stalling while driving or failing to start, leaving you stranded.
Common symptoms
- Illuminated Check Engine Light
- Engine cranks but will not start
- Engine stalls unexpectedly while driving
- Significant loss of engine power or limp mode
- Rough idling or hesitation before stalling
Likely causes
- Short to power in the fuel shutoff valve control circuit
- Faulty fuel shutoff valve (internal short)
- Corroded, damaged, or loose electrical connector at the valve
- Open ground circuit in the valve wiring harness
- Faulty Engine Control Module (ECM) (rare)
What to check before replacing parts
Visually inspect the wiring harness and connector for the fuel shutoff valve.
Look for: Look for frayed wires, melted insulation, or corroded pins that could cause a short to power.
Use a multimeter to check for voltage at the fuel shutoff valve connector with the key on.
Look for: If voltage is present on the control wire when the ECM is not commanding it, there is a short to power in the harness.
Test the ground circuit for the fuel shutoff valve.
Look for: A high resistance reading or lack of continuity to ground indicates an open ground circuit causing the high voltage code.
Measure the internal resistance of the fuel shutoff valve solenoid.
Look for: Compare the resistance reading to the manufacturer's specifications; an out-of-spec reading indicates a faulty valve.
Test the ECM output signal to the fuel shutoff valve.
Look for: If the wiring is good but the ECM is constantly outputting a high voltage signal, the ECM may be internally shorted.
This page explains the generic P0007 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
Gear guide: Best OBD2 ScannersRead this code yourself next time — from $20 Bluetooth dongles to bidirectional scan tools.Rather have a pro handle it? Find a vetted local mechanic.