P2A2BAlternative Fuel Tank Shutoff Valve D Control Circuit Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2A2B is the functional fault of valve D: the module has commanded it open, but the pressure picture suggests that cylinder D is not contributing gas. Bus builder New Flyer gives figures for the scale involved: its tanks hold between 1,375 and 24,800 kPa, while the regulated side should read 648 to 827 kPa once the engine runs. When a valve sticks shut, its cylinder stays full, and bulletin SMB-169 has the technician close the hand valves of that tank and its neighbours before venting it through the purge line. No car or truck maker publishes P2A2B. A failed coil whose circuit still tests intact can produce the same picture. The sister codes P2A2A, P2A2C and P2A2D deal with the wiring of this solenoid.
- What you may notice
- Check engine light
- Tank D stays at full pressure
- Reduced range on gas
- Likely causes
- PossibleValve D mechanically stuck shut
- PossibleWeak coil that no longer pulls the armature
- RareHand valve on tank D closed after service
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.