Possible Cause
WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0139
- Harness or connectors [The heated oxygen sensor 2 (bank 1) circuit is open or shorted.]
- Heated oxygen sensor 2 (bank 1)
- Fuel system
- EVAP system
- Intake air system
DTC P0159
- Harness or connectors [The heated oxygen sensor 2 (bank 2) circuit is open or shorted.]
- Heated oxygen sensor 2 (bank 2)
- Fuel system
- EVAP system
- Intake air system