What does code P24DB mean?

Q: What does code P24DB mean?

Reductant Purge Control Valve B Circuit Open. P24DB indicates that the powertrain control module (PCM) has detected an open circuit in the control wire for the reductant purge control valve B, which is part of the diesel exhaust fluid (DEF) system. The PCM commands the valve to purge reductant from the system, but the electrical feedback on the circuit does not match the expected voltage, indicating a break in the circuit.

DTC codes / P24xx · Auxiliary emission controls / P24DB

P24DBReductant Purge Control Valve B Circuit Open

P24DB indicates that the powertrain control module (PCM) has detected an open circuit in the control wire for the reductant purge control valve B, which is part of the diesel exhaust fluid (DEF) system. The PCM commands the valve to purge reductant from the system, but the electrical feedback on the circuit does not match the expected voltage, indicating a break in the 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.