What does code P24CE mean?

Q: What does code P24CE mean?

Reductant Tank Cap Switch Circuit High. P24CE indicates that the engine control module has detected an abnormally high voltage on the reductant tank cap switch circuit, which is part of the diesel exhaust fluid system. The switch is designed to confirm that the tank cap is properly installed and sealed, and a high voltage reading typically means the circuit is open, shorted to voltage, or the switch contact is not closing as expected.

DTC codes / P24xx · Auxiliary emission controls / P24CE

P24CEReductant Tank Cap Switch Circuit High

P24CE indicates that the engine control module has detected an abnormally high voltage on the reductant tank cap switch circuit, which is part of the diesel exhaust fluid system. The switch is designed to confirm that the tank cap is properly installed and sealed, and a high voltage reading typically means the circuit is open, shorted to voltage, or the switch contact is not closing as expected.

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.