DTC P0421 Or DTC P0431: Notes
NOTE:
Right front HO2S is identified as O2S11. Right rear HO2S is identified as O2S12. Left front HO2S is identified as O2S21. Left rear HO2S is identified as O2S22.
Code Definition
- DTC P0421: Right Side Warm-Up Catalyst System Efficiency Below Threshold
- DTC P0431: Left Side Warm-Up Catalyst System Efficiency Below Threshold