OBD-II code · Powertrain (generic, extended)
P26B4 Fuel Shutoff Valve A Control Circuit Stuck On
The first fuel shutoff valve stays open when commanded closed. Fuel cannot be cut off via this path during a safety event.
Is it safe to drive with P26B4?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyValve seized open by debris
- PossibleECU output driver stuck on
- Less likelyCarbon or debris buildup preventing free movement
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–3.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Fuel Shutoff Valve A, Solenoid
Related codes
- P26B6Fuel Shutoff Valve B Control Circuit Stuck On
- P26B1Engine Coolant Bypass Valve A Stuck Closed
- P26B2Engine Coolant Bypass Valve B Stuck Closed
- P26B3Fuel Shutoff Valve A Control Circuit Performance/Stuck Off
- P26B5Fuel Shutoff Valve B Control Circuit Performance/Stuck Off
- P26B7Engine Coolant Bypass Valve C Control Circuit / Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.