OBD-II code · Powertrain (generic, extended)
P224C Alternative Fuel Tank Shutoff Valve A Control Circuit/Open
The drive circuit for the shutoff valve at the alternative-fuel tank A is open. Bi-fuel vehicles (CNG, LPG, hydrogen) use a high-pressure shutoff valve at the tank for safety; with this fault the alternative fuel cannot be drawn from the tank.
Is it safe to drive with P224C?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySolenoid winding open
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Alternative Fuel Shutoff Valve
Related codes
- P2A22Alternative Fuel Tank Shutoff Valve B Control Circuit/Open
- P2A26Alternative Fuel Tank Shutoff Valve C Control Circuit/Open
- P2A2AAlternative Fuel Tank Shutoff Valve D Control Circuit/Open
- P2A2EAlternative Fuel Tank Shutoff Valve E Control Circuit/Open
- P2249O2 Sensor Reference Voltage Circuit Low (Bank 2 Sensor 1)
- P224ANOx Sensor Heater Resistance (Bank 1 Sensor 1)
- P224BNOx Sensor Heater Resistance (Bank 1 Sensor 2)
- P224DAlternative Fuel Tank Shutoff Valve A Control Circuit Performance/Stuck Off
- P224EAlternative Fuel Tank Shutoff Valve A Control Circuit Low
- P224FAlternative Fuel Tank Shutoff Valve A Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.