P224EAlternative Fuel Tank Shutoff Valve A Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P224E sets when the control line of tank shutoff valve A reads too low. The DTC list of CNG upfitter TransEco Energy for its alternative fuel control module (AFCM v1.4) blames the line touching ground or being interrupted, turns on the MIL in both dedicated and bi-fuel setups and lets the system keep operating normally rather than forcing a fallback. The same list uses P2A24 and related numbers for valves B to E. Ford's own Boss 302S code list also contains P224E. On a normally closed valve such as the one on GM's bi-fuel Impala, a grounded control wire may keep the solenoid from switching as intended. P224F is the high side, P224C the general open circuit. Gas lines must stay sealed during wiring repairs.
- What you may notice
- Check engine light
- Gas operation unavailable or interrupted
- Likely causes
- LikelyControl wire of the tank valve chafed through to ground
- PossibleOpen circuit, which some modules report under this code
- RareShorted solenoid coil in the valve
- 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 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.