P0007 means the engine control module has detected an abnormally high voltage condition on the electrical circuit that controls the fuel shutoff valve. A 'circuit high' reading usually indicates a short-to-voltage in the wiring, an open or failed valve solenoid, or a control-signal problem that prevents the valve from operating as commanded. This can disrupt fuel flow and lead to no-start, stall, or limp-mode behavior.
The valve coil can open internally, bind, or fail mechanically, altering circuit resistance and triggering a high-side circuit code.
The control wire may chafe against a power feed, or a connector pin may be bent or corroded, keeping circuit voltage high when the ECM expects a low-side command.
A broken wire, poor ground path, or corroded terminal can prevent normal current flow and be interpreted as a high-voltage or open-circuit fault.
Heat, abrasion, or pin-tension problems in the connector can change circuit resistance and set the code.
Rarely, the output transistor inside the engine computer fails and cannot pull the circuit low; consider this only after the valve and wiring have been ruled out.
Usually no. PCM failure is an uncommon cause of this code. Most cases are a failed fuel shutoff valve or a wiring/connector problem; replace or reprogram the PCM only after those have been thoroughly tested.
It is not advisable. A fuel shutoff valve circuit fault can cause stalling or a no-start condition, which creates a safety risk; repair it before extended driving.
You can clear it to verify a repair, but if the valve, wiring, or connector fault remains, the MIL will come back and the drivability problem will persist.
The generic definition is a high-side fault on the fuel shutoff valve control circuit, but exact pinout, valve location, and enabling conditions vary by manufacturer; always follow the specific service information.