What does code P24D7 mean?

Q: What does code P24D7 mean?

EVAP System Pressure Sensor or Switch B Circuit Low. P24D7 means the engine computer has detected an abnormally low voltage signal on the circuit for the EVAP system pressure sensor or switch B, which monitors fuel vapor pressure in the evaporative emission control system. The computer expects a voltage within a specific range, and a low reading tells it the sensor circuit is shorted to ground, the sensor has failed, or a wiring fault is pulling the signal down.

DTC codes / P24xx · Auxiliary emission controls / P24D7

P24D7EVAP System Pressure Sensor or Switch B Circuit Low

P24D7 means the engine computer has detected an abnormally low voltage signal on the circuit for the EVAP system pressure sensor or switch B, which monitors fuel vapor pressure in the evaporative emission control system. The computer expects a voltage within a specific range, and a low reading tells it the sensor circuit is shorted to ground, the sensor has failed, or a wiring fault is pulling the signal down.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.