P0007 critical

Fuel Shutoff Valve Control Circuit High

The P0007 code means the vehicle's onboard diagnostic system has detected: Fuel Shutoff Valve Control Circuit High. This is a critical severity code.

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Keep driving?: No -- stop driving
DIY difficulty: hard
Estimated cost: $200 - $700 (parts and labor)

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Common Symptoms

Engine runs continuously and cannot be shut off
Check Engine Light on
Engine stalling issues
Abnormal engine behavior at shutdown

Probable Causes (Ranked by Likelihood)

Short to battery voltage in fuel shutoff valve wiring Very High
Failed fuel shutoff valve stuck open High
Aftermarket wiring modification causing voltage feed Moderate
ECM driver circuit failure Low

Step-by-Step Diagnostic Procedure

Disconnect the fuel shutoff valve connector and measure voltage on the control wire with key off; any voltage indicates a short to power
Check for aftermarket wiring taps or splices in the shutoff valve circuit
Test the shutoff valve solenoid for proper resistance and mechanical movement when energized
Verify ECM can properly ground the shutoff valve circuit using a bidirectional scan tool test

Frequently Asked Questions

Can P0007 prevent me from turning off my engine?

In some cases, yes. If the fuel shutoff valve is stuck open due to a constant voltage feed, a diesel engine may continue to run after turning the key off because fuel continues flowing to the injection pump.

What should I do if my diesel engine will not shut off?

If your diesel engine will not shut off with the key, you can stall it by putting it in a high gear and releasing the clutch with the brake applied on a manual transmission. On an automatic, block the air intake briefly. Then have the vehicle towed for repair.

Is P0007 related to aftermarket accessories?

Aftermarket installations that tap into the fuel shutoff valve wiring or share the same circuit can introduce a voltage feed. If this code appeared after installing any electrical accessories, inspect those connections first.