P2665
Fuel Shutoff Valve B Control Circuit/Open
Fuel delivery / shutoff
Generic OBD-II
High
What it means
P2665 means the PCM detected an open (broken) electrical circuit to the 'B' fuel shutoff valve. This valve controls whether fuel is allowed to reach the engine, so if it can't be operated the engine may start hard, stall, or fail to start. The fault is electrical — usually broken wiring, a bad connector, or a failed valve solenoid — though on some vehicles a tripped inertia/fuel-cutoff switch can be involved.
High
Can I keep driving? Limited — if the shutoff valve can't open, the engine may start hard, stall, or not start at all; have it checked before relying on the vehicle.
Common symptoms
What you'll notice
- Check-engine light on
- Hard starting or a no-start
- Stalling
- Engine may not shut off normally
Common causes
Most likely first
- Open circuit — broken wiring or a poor connection in the shutoff valve 'B' control circuitLikely
- Faulty fuel shutoff valve solenoidCommon
- Blown fuse or faulty relayCommon
- Tripped inertia / fuel-cutoff switch (if equipped)Less often
- Corroded connector, bad ground, or faulty PCMLess often
How to diagnose & fix
Work through it in order
- Scan and confirm the code, then check for a tripped inertia switch if the vehicle has one.
- Inspect the shutoff valve wiring and connector for an open or corrosion.
- Check the fuse and any relay in the circuit.
- Test the valve solenoid's resistance and its supply/ground.
- Replace the valve if faulty; repair wiring as needed, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2665?+
Not reliably. The shutoff valve controls whether fuel reaches the engine, so an open circuit can cause hard starting, stalling, or a no-start. Have it diagnosed promptly.
Can I just clear P2665?+
It returns as soon as the PCM re-tests the open circuit. Fix the valve or wiring first, then clear and re-test.
Related codes
Often seen with P2665
Read & clear P2665 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX