What it means
The control module monitors the operation of fuel shutoff valve B when it commands the valve to open. It sets this code when the valve is detected as remaining off or failing to open as expected.
At a glance
- Usually lights the check-engine light
How it works
Fuel shutoff valve B controls fuel flow through its own supply path when the control module commands it to open. This code indicates valve B remains off or fails to open as expected, which can restrict fuel delivery through that path and cause starting or running problems.
Common causes
Most likely first.
- Valve seized closed by debris
- Solenoid loses force from coil aging
- Carbon or debris buildup preventing free movement
Symptoms
- Check-engine light
- Engine may crank without starting
- Engine may stall or lose power
How to diagnose it
- Record freeze-frame data and check for related fuel-pressure, crank-no-start, or stalling codes.
- Inspect fuel shutoff valve B and its connector and wiring for looseness, corrosion, or physical damage.
- Use a scan tool, if supported, to command valve B open and check for a reported change in valve status.
- Test valve B's control circuit and solenoid for continuity and shorts to the manufacturer's specification.
- If the circuit passes, check for debris or a sticking mechanism preventing valve B from opening.
Common fixes
- Reconnect or repair damaged wiring at fuel shutoff valve B.
- Clear debris that is obstructing valve B.
- Replace the valve B solenoid if its coil fails the manufacturer's test.
- Replace fuel shutoff valve B if it remains seized closed.
Can I keep driving?
If the engine cranks without starting, stalls, or loses power, avoid driving and arrange a safe stop or recovery. Restricted fuel flow through valve B can cause sudden power loss and may leave the vehicle unable to restart.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.