What does code P243C mean?

Q: What does code P243C mean?

Particulate Filter Regeneration Frequency Bank 2. This code indicates that the powertrain control module has detected an abnormal regeneration frequency for the diesel particulate filter on bank 2 of the engine. The computer monitors the time or distance between regeneration events and sets this code when the frequency falls outside the expected range, typically because the filter is loading with soot faster than normal or the regeneration process is not completing effectively.

DTC codes / P24xx · Auxiliary emission controls / P243C

P243CParticulate Filter Regeneration Frequency Bank 2

This code indicates that the powertrain control module has detected an abnormal regeneration frequency for the diesel particulate filter on bank 2 of the engine. The computer monitors the time or distance between regeneration events and sets this code when the frequency falls outside the expected range, typically because the filter is loading with soot faster than normal or the regeneration process is not completing effectively.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.