DTC Detection Logic
WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
The heated oxygen sensor 2 has a much longer switching time between rich and lean than the air fuel ratio (A/F) sensor 1. The oxygen storage capacity of the three way catalyst (manifold) causes the longer switching time. To judge the malfunctions of heated oxygen sensor 2, ECM monitors whether the maximum voltage of the sensor is sufficiently high during various driving conditions such as fuel-cut.
| : 0.72 V |
| DTC No. | CONSULT screen terms (Trouble diagnosis content) |
DTC detecting condition | Possible cause |
|---|---|---|---|
| P0137 | HO2S2 (B1) (O2 sensor circuit low voltage bank 1 sensor 2) |
The maximum voltage from the sensor does not reach the specified voltage. |
|
| P0157 | HO2S2 (B2) (O2 sensor circuit low voltage bank 2 sensor 2) |