What does code P242F mean?

Q: What does code P242F mean?

Particulate Filter Restriction Ash Accumulation Bank 1. P242F means the engine computer has calculated that the diesel particulate filter (DPF) on bank 1 has accumulated too much ash, which is the non-combustible residue left after soot is burned off during regeneration. The computer typically derives this from pressure sensor readings and a learned soot-to-ash model, and it sets the code when the restriction exceeds a calibrated threshold.

DTC codes / P24xx · Auxiliary emission controls / P242F

P242FParticulate Filter Restriction Ash Accumulation Bank 1

P242F means the engine computer has calculated that the diesel particulate filter (DPF) on bank 1 has accumulated too much ash, which is the non-combustible residue left after soot is burned off during regeneration. The computer typically derives this from pressure sensor readings and a learned soot-to-ash model, and it sets the code when the restriction exceeds a calibrated threshold.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

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.