What does code P24CD mean?

Q: What does code P24CD mean?

Reductant Tank Cap Switch Circuit Low. P24CD indicates that the powertrain control module has detected a low-voltage condition on the circuit for the reductant tank cap switch, which is part of the diesel exhaust fluid system. The computer expects to see a specific voltage on the signal circuit when the cap is closed, and a low reading tells it that the circuit is grounded when it should not be.

DTC codes / P24xx · Auxiliary emission controls / P24CD

P24CDReductant Tank Cap Switch Circuit Low

P24CD indicates that the powertrain control module has detected a low-voltage condition on the circuit for the reductant tank cap switch, which is part of the diesel exhaust fluid system. The computer expects to see a specific voltage on the signal circuit when the cap is closed, and a low reading tells it that the circuit is grounded when it should not be.

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.