What does code P2404 mean?

DTC codes / P24xx · Auxiliary emission controls / P2404

P2404Evaporative Emission System Leak Detection Pump Sense Circuit Range/Performance

P2404 indicates that the engine computer has detected an out-of-range or erratic signal from the leak detection pump sense circuit within the evaporative emission (EVAP) system. The computer expects a specific voltage or resistance pattern from the sensor that monitors the pump's operation, and the actual reading falls outside the acceptable performance window.

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.