What Does P0006 Mean?
P0006 indicates a low voltage condition on the Fuel Shutoff Valve 'A' control circuit. The ECM has detected that the voltage on this circuit is below the normal operating range, which typically means a short to ground in the wiring or a partially shorted solenoid coil. The fuel shutoff valve may be energized continuously or unable to operate properly, leading to starting issues or the engine not shutting off cleanly.
Safety Warning
A shorted fuel shutoff valve circuit may prevent the engine from shutting off (especially on diesel engines) or cause erratic fuel delivery. This poses a safety risk, particularly if the engine cannot be turned off. Do not drive until diagnosed and repaired.
Common Causes
35%
Short to ground in the fuel shutoff valve wiring where the harness contacts a sharp edge or hot component
30%
Fuel shutoff valve solenoid coil partially shorted, drawing excessive current and dropping the circuit voltage
20%
Water intrusion into the solenoid connector causing a low-resistance path between the signal wire and ground
15%
ECM internal driver pulling the circuit low due to a component failure on the output stage
Diagnostic Steps
1
Disconnect the fuel shutoff valve solenoid and measure circuit voltage at the harness connector with the key on — if voltage is still low with the solenoid unplugged, the short is in the wiring.
2
With the solenoid disconnected, check for a short to ground on the control wire — measure resistance from the signal wire to chassis ground. Any reading under 10k ohms indicates a short.
3
Measure the solenoid coil resistance and compare to manufacturer spec — a reading significantly below spec indicates an internal short in the coil windings.
4
Inspect the wiring harness from the solenoid to the ECM, paying attention to routing near exhaust components, sharp brackets, and areas exposed to road spray.
5
If the wiring and solenoid test normal, monitor the ECM driver output with an oscilloscope to verify proper voltage levels during commanded on/off cycles.
Estimated Repair Cost
$100 - $550
Parts + labor, varies by vehicle and location
P0006 indicates a low voltage condition on the Fuel Shutoff Valve 'A' control circuit. The ECM has detected that the voltage on this circuit is below the normal operating range, which typically means a short to ground in the wiring or a partially shorted solenoid coil. The fuel shutoff valve may be ...
The most common cause of P0006 (Fuel Shutoff Valve "A" Control Circuit Low) is: Short to ground in the fuel shutoff valve wiring where the harness contacts a sharp edge or hot component
Typical repair costs for P0006 range from $100 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A shorted fuel shutoff valve circuit may prevent the engine from shutting off (especially on diesel engines) or cause erratic fuel delivery. This poses a safety risk, particularly if the engine cannot be turned off. Do not drive until diagnosed and repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0006 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
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