What does code P24EF mean?

Q: What does code P24EF mean?

Control Module Wake-up Circuit/Open. P24EF indicates that a control module responsible for waking up other modules on the vehicle's communication network has detected an open circuit in its wake-up activation path. The module expects to see a voltage signal on the wake-up circuit when the ignition is turned on or when a wake-up command is sent, but it detects no voltage, indicating a break in the wire, a faulty connection, or a failed component in that circuit.

DTC codes / P24xx · Auxiliary emission controls / P24EF

P24EFControl Module Wake-up Circuit/Open

P24EF indicates that a control module responsible for waking up other modules on the vehicle's communication network has detected an open circuit in its wake-up activation path. The module expects to see a voltage signal on the wake-up circuit when the ignition is turned on or when a wake-up command is sent, but it detects no voltage, indicating a break in the wire, a faulty connection, or a failed component in that circuit.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

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.