Malfunction B
WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
To judge the malfunctions of heated oxygen sensor 2, ECM monitors whether the minimum voltage of sensor is sufficiently low during the various driving condition such as fuel-cut.
DTC DETECTING CONDITION AND POSSIBLE CAUSE
| DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause | |
|---|---|---|---|---|
| P0138 0138 (Bank 1) | Heated oxygen sensor 2 circuit high voltage | A) | An excessively high voltage from the sensor is sent to ECM. |
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| P0158 0158 (Bank 2) | B) | The minimum voltage from the sensor is not reached to the specified voltage. |
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