Powertrain, generic (extended)

P24BF EVAP System Leak Detection Pump Switching Valve Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P24BF flags too much current in the switching valve circuit while the valve is energised. Mitsubishi's 2023 Outlander PHEV measures coil current through its low-side driver and sets the code when it reaches 2 A or more for 2 s with the valve commanded on. Such a value suggests a shorted coil or a control wire that touches battery voltage, so the driver is effectively feeding a dead short. The engine computer then blocks purge, keeps the fuel door locked and asks for a refuelling-system service. Check the wire between module and ECM for chafing before condemning the module, which carries pump, valve and sensor in one housing. The opposite electrical fault is P24BE; a valve that switches but does not seal is P24C0 or P24C1.

Likely causes

Switching valve coil shorted inside the module
Control wire shorted to battery voltage
Output driver in the engine control module faulty

Symptoms

  • Malfunction indicator lamp on
  • Fuel filler door stays locked
  • Canister purge switched off

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–500
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

evap leak detection pump switching valve

Related codes

P24BDP24BEP24C0P24C1P2420

References: mitsubishitechinfo.com, law.cornell.edu.