What does code P24DD mean?

Q: What does code P24DD mean?

Reductant Purge Control Valve B Circuit Low. P24DD indicates that the powertrain control module (PCM) has detected a low-voltage condition on the electrical circuit for the reductant purge control valve B, which is part of the diesel exhaust fluid (DEF) system. The PCM monitors the valve's control circuit and sets this code when the signal voltage falls below the expected threshold, typically indicating a short to ground or an open circuit.

DTC codes / P24xx · Auxiliary emission controls / P24DD

P24DDReductant Purge Control Valve B Circuit Low

P24DD indicates that the powertrain control module (PCM) has detected a low-voltage condition on the electrical circuit for the reductant purge control valve B, which is part of the diesel exhaust fluid (DEF) system. The PCM monitors the valve's control circuit and sets this code when the signal voltage falls below the expected threshold, typically indicating a short to ground or an open 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.