What does code P243A mean?

Q: What does code P243A mean?

Particulate Filter Restriction Ash Accumulation Bank 2. P243A indicates that the powertrain control module has calculated excessive ash accumulation in the bank 2 particulate filter, which is the exhaust bank that does not contain cylinder number one. The computer derives this from pressure sensor readings across the filter and from its learned soot and ash models, and it sets the code when the restriction exceeds the expected threshold for the accumulated mileage.

DTC codes / P24xx · Auxiliary emission controls / P243A

P243AParticulate Filter Restriction Ash Accumulation Bank 2

P243A indicates that the powertrain control module has calculated excessive ash accumulation in the bank 2 particulate filter, which is the exhaust bank that does not contain cylinder number one. The computer derives this from pressure sensor readings across the filter and from its learned soot and ash models, and it sets the code when the restriction exceeds the expected threshold for the accumulated mileage.

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.