What does code P24FA mean?

DTC codes / P24xx · Auxiliary emission controls / P24FA

P24FAExhaust Aftertreatment Fuel Air Purge Valve Control Circuit Low

P24FA indicates that the powertrain control module (PCM) has detected an abnormally low voltage on the control circuit for the exhaust aftertreatment fuel air purge valve. This valve is used in diesel exhaust fluid (DEF) or fuel-based aftertreatment systems to purge air or fuel vapor from the exhaust treatment circuit, and a low circuit condition means the PCM sees voltage below the expected threshold when the circuit is commanded on.

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.