P2A26Alternative Fuel Tank Shutoff Valve C Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2A26 is the open-circuit code for shutoff valve C, the solenoid on yet another gas cylinder. The module drives the coil and finds that no current flows, so the coil, its plug or the lead to it is interrupted. No manufacturer documents P2A26 publicly. What the repair costs depends on the design: in GM's single-tank bi-fuel Impala (bulletin PI1330) the high-pressure solenoid is threaded into the tank's manual valve and counts as non-serviceable, so a faulty one means a new tank, whereas New Flyer buses allow the coil alone to be exchanged. CARB requires output components to be watched for open and shorted circuits. Valves B, D and E have their own open-circuit codes, P2A22, P2A2A and P2A2E.
- What you may notice
- Check engine light
- Gas in cylinder C cannot be used
- Likely causes
- LikelyInterrupted lead or unplugged connector at valve C
- PossibleOpen coil in valve C
- RareFaulty driver for valve C in the control module
- 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: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.