What does code P24AB mean?

Q: What does code P24AB mean?

EGR Cooler Coolant Pump Stuck On. P24AB means the engine control module has detected that the electric coolant pump for the exhaust gas recirculation cooler is running when it should be off, based on the pump's feedback signal or current draw. The computer commands the pump off under certain conditions but continues to see evidence of pump operation, so it flags the circuit as stuck on.

DTC codes / P24xx · Auxiliary emission controls / P24AB

P24ABEGR Cooler Coolant Pump Stuck On

P24AB means the engine control module has detected that the electric coolant pump for the exhaust gas recirculation cooler is running when it should be off, based on the pump's feedback signal or current draw. The computer commands the pump off under certain conditions but continues to see evidence of pump operation, so it flags the circuit as stuck 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.