P24D5 code meaning
EVAP System Pressure Sensor/Switch B Circuit
Powertrain system Generic code P24xx codes Check engine light
What P24D5 means
P24D5 is the general circuit code for a second EVAP pressure sensor, called B to tell it apart from the main sensor A (P0450 range). Which sensor is B depends on the maker: Mitsubishi's 2023 Outlander PHEV uses it for an absolute fuel tank pressure sensor on its sealed tank, GM for a canister vapour pressure sensor, and Audi's bulletin 2069531 assigns sensor 2 to the G950 part in the purge path. No manufacturer documents P24D5 itself publicly; all three use the more specific P24D6 to P24D8. CARB requires circuit checks on every EVAP input. A stored P24D5 suggests a fault in the 5 V reference, ground or signal wire of that sensor; until it is fixed the leak or purge diagnostics depending on it are blocked.
P24D5 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 P24D5
- Malfunction indicator lamp on
- EVAP readiness monitor incomplete
Common causes of P24D5
- Most likelyOpen or shorted reference, ground or signal wire of sensor B
- PossibleLoose or corroded connector at sensor B
- PossibleEVAP pressure sensor B failed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EVAP pressure sensor b
What each part of P24D5 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). |
| D5 | The exact fault in that area. |
What to do next
- Note P24D5 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 P24D5
What does P24D5 mean?
P24D5 means "EVAP System Pressure Sensor/Switch B Circuit". P24D5 is the general circuit code for a second EVAP pressure sensor, called B to tell it apart from the main sensor A (P0450 range). It is a generic code, so it means the same on every make.
Is it safe to drive with P24D5?
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 P24D5 fail an emissions test?
Yes, it can. P24D5 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 P24D5 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 P24D5 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.