P2A24 code meaning
Alternative Fuel Tank Shutoff Valve B Control Circuit Low
Powertrain system Generic code P2Axx codes Check engine light
What P2A24 means
P2A24 means the alternative fuel module sees the control line of shutoff valve B sitting too low. TransEco Energy, which converts trucks to CNG, assigns it in the fault table of its AFCM v1.4 to a lead shorted to ground or open, lights the MIL on dedicated and bi-fuel systems alike and does not force a fallback. The same table prints P2A14 in a second column beside it, a number that current code lists give to injection pump metering C. Ford's 2014 Boss 302S code list also includes P2A24, though without the MIL marker it shows for P224E. Chafed wires along the cylinder mounts are a classic cause. P2A25 is the high counterpart, P2A28 the matching fault on valve C.
P2A24 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2A24
- Check engine light
- Gas from tank B unavailable, range reduced
Common causes of P2A24
- Most likelyControl wire of valve B chafed through to ground at a tank bracket
- PossibleOpen lead, which the TransEco module reports under this code
- Less likelyShorted turns in the coil of valve B
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Alt fuel tank shutoff valve bWiring harnessAfcm
What each part of P2A24 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| A | Area: hybrid propulsion. |
| 24 | The exact fault in that area. |
What to do next
- Note P2A24 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2A24
What does P2A24 mean?
P2A24 means "Alternative Fuel Tank Shutoff Valve B Control Circuit Low". P2A24 means the alternative fuel module sees the control line of shutoff valve B sitting too low. It is a generic code, so it means the same on every make.
Is it safe to drive with P2A24?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2A24 fail an emissions test?
Yes, it can. P2A24 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2A24 to fix?
Difficulty: hard. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2A24 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.