P24D9EVAP System Pressure Sensor/Switch B Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P24D9 covers a sensor B signal that keeps flickering instead of failing outright. Mitsubishi's 2023 Outlander PHEV runs this check once per drive cycle inside the parked leak test, when the controller wakes at its scheduled times and coolant and intake air lie between 4 and 35 °C. It counts how often the tank pressure signal crosses the sensor's own filter value and stores the code after more than 20 crossings; the display then asks for a refuelling-system service. The service hints name the tank pressure sensor, the tank differential pressure sensor and their wiring. Shaking the harness while watching live data often reveals the spot. Steady low or high voltages fall under P24D7 or P24D8, implausible but stable readings under P24D6.
- What you may notice
- Malfunction indicator lamp on
- Refuelling system service message on the display
- Likely causes
- LikelyLoose terminal or poor contact at the tank pressure sensor
- PossibleHarness chafed along the fuel tank
- PossibleTank pressure or tank differential pressure sensor unstable
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.