P26B3Fuel Shutoff Valve A Control Circuit Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Fuel shut-off valves are electrically opened valves that isolate a gaseous or liquefied fuel, as on CNG or propane systems. P26B3 says valve A does not achieve its intended effect although it was commanded. Roush CleanTech documents it for its fourth-generation propane system on Ford E- and F-Series trucks (2016–2018), where it shares a check with P009E: at key-up the PCM reads rail pressure to see whether the rail was bled, and pressure still present at that point sets the code. Roush names a leaking check valve or a leaking supply solenoid in the rail pressure module, a clogged bleed restrictor or a kinked EVAP line. Its MIL status differs by vehicle. The result can be hard starting. P0005 is the electrical open on valve A; P26B4 is the stuck-on case.
- What you may notice
- Hard starting after the vehicle has been parked
- Check engine light on some vehicles
- Possible fuel odour
- Likely causes
- LikelyLeaking check valve or supply solenoid in the rail pressure module
- PossibleClogged bleed restrictor or kinked EVAP line
- PossibleShut-off valve A not switching as commanded
- RareBlown fuse in the valve supply
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.