What does code P2C7A mean?

DTC codes / P2Cxx · Hybrid propulsion / P2C7A

P2C7ASCR NOx Catalyst Efficiency Below Threshold Bank 1 Catalyst 2

P2C7A indicates that the powertrain control module has determined the selective catalytic reduction (SCR) system's second nitrogen oxide (NOx) catalyst, on bank 1, is not converting NOx efficiently enough. The computer monitors NOx sensors before and after the catalyst and sets this code when the downstream sensor reports a conversion rate below the calibrated threshold.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.