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.

Real-world scan data

Seen in

396

scans in the past year

Found in

0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P2665 scans

P0607in 18.2% of scans

P2408in 12.9% of scans

P1432in 12.6% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P2665 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX