Malfunction B
To judge the malfunctions of heated oxygen sensor 2, ECM monitors whether the minimum voltage of sensor is sufficiently low during various driving conditions such as fuel cut.
| DTC No. | Trouble diagnosis name (Trouble diagnosis content) | DTC detecting condition | Possible cause | |
|---|---|---|---|---|
| P0138 | HO2S2 (B1) [Heated oxygen sensor 2 (bank 1) circuit high voltage] | A) | An excessively high voltage from the sensor is sent to ECM. |
|
| B) | The minimum voltage from the sensor is not reached to the specified voltage. |
|
||
| P0158 | HO2S2 (B2) [Heated oxygen sensor 2 (bank 2) circuit high voltage] | A) | An excessively high voltage from the sensor is sent to ECM. |
|
| B) | The minimum voltage from the sensor is not reached to the specified voltage. |
|
||