Powertrain, generic (extended)

P24BE EVAP System Leak Detection Pump Switching Valve Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P24BE says the voltage on the switching valve control line is too low while the valve should be idle. Mitsubishi documents it for the 2023 Outlander PHEV: the valve sits in the ELCM leak check unit, is supplied by the MFI relay and grounded by a transistor in the engine computer, and the code sets when the line reads 3 V or less for 2 s with the valve not commanded. That pattern fits a missing relay supply, an open coil or a control wire shorted to ground. As a fail-safe the car stops purging, keeps the fuel filler door shut and shows a refuelling-system service message. P24BF is the over-current counterpart, P24BD the general circuit code; the related 0.020 inch leak test cannot finish meanwhile.

Likely causes

No supply from the relay to the valve (fuse, relay, wire)
Switching valve coil open inside the module
Control wire between module and ECM shorted to ground

Symptoms

  • Malfunction indicator lamp on
  • Fuel filler door does not open with the opener switch
  • Refuelling system service message on the display

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

P24BDP24BFP24C0P24C1P2419

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