P24BD code meaning
EVAP System Leak Detection Pump Switching Valve Control Circuit/Open
Powertrain system Generic code P24xx codes Check engine light
What P24BD means
P24BD points to the drive circuit of the switching valve inside the leak check module. This small solenoid moves the canister vent path between open air and the reference orifice, so the module can first measure a known leak and then test the real system. The code stands for an open or generally faulty control circuit. No manufacturer documents P24BD publicly; Mitsubishi's 2023 Outlander PHEV splits the same valve into P24BE and P24BF, where the valve is fed from a relay and switched to ground by the engine computer. CARB requires output components like this to be checked for circuit faults. Without a working valve the leak test cannot run; in Mitsubishi's design purge is blocked and the fuel door stays locked.
P24BD at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P24BD
- Malfunction indicator lamp on
- EVAP leak test does not run
- On some designs fuel door locked or purge disabled
Common causes of P24BD
- Most likelySwitching valve coil open inside the leak check module
- PossibleOpen control or supply wire, blown fuse or relay fault
- PossibleCorroded connector at the module
- Less likelyOutput driver in the engine control module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EVAP leak detection pump switching valve
What each part of P24BD means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| BD | The exact fault in that area. |
What to do next
- Note P24BD 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 P24BD
What does P24BD mean?
P24BD means "EVAP System Leak Detection Pump Switching Valve Control Circuit/Open". P24BD points to the drive circuit of the switching valve inside the leak check module. It is a generic code, so it means the same on every make.
Is it safe to drive with P24BD?
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 P24BD fail an emissions test?
Yes, it can. P24BD 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 P24BD to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P24BD clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.