OBD-II code · Powertrain (generic, extended)
P2666 Fuel Shutoff Valve B Control Circuit Low
Voltage on the secondary fuel shutoff valve control line is below the expected window. Usually a short to ground or a shorted solenoid coil.
Is it safe to drive with P2666?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl wire shorted to ground
- PossibleInternal short in solenoid coil
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Fuel Shutoff Valve B, Solenoid, Wiring Harness
Related codes
- P0006Fuel Shutoff Valve A Control Circuit Low
- P2663B Rocker Arm Actuator Control Circuit Low Bank 2
- P2664B Rocker Arm Actuator Control Circuit High Bank 2
- P2665Fuel Shutoff Valve B Control Circuit / Open
- P2667Fuel Shutoff Valve B Control Circuit High
- P2668Fuel Mode Indicator Lamp Control Circuit
- P2669Actuator Supply Voltage B Circuit / Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.