What does code P246C mean?

Q: What does code P246C mean?

Particulate Filter Restriction Forced Limited Power Bank 1. P246C indicates that the powertrain control module has detected an excessive restriction in the diesel particulate filter on bank 1, and it has deliberately limited engine power to protect the filter and exhaust system from damage. The computer compares measured pressure drop across the filter against expected values and commands reduced torque when the restriction exceeds a calibrated threshold.

DTC codes / P24xx · Auxiliary emission controls / P246C

P246CParticulate Filter Restriction Forced Limited Power Bank 1

P246C indicates that the powertrain control module has detected an excessive restriction in the diesel particulate filter on bank 1, and it has deliberately limited engine power to protect the filter and exhaust system from damage. The computer compares measured pressure drop across the filter against expected values and commands reduced torque 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.