DTC P0138 Or DTC P0158: Notes
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
Code Definition
- DTC P0138: Right Rear HO2S Circuit - High Input
- DTC P0158: Left Rear HO2S Circuit - High Input
NOTE:
Right rear HO2S is identified as O2S12 and left rear HO2S is identified as O2S22.