Oxygen Sensor P0155 Fix HD

The front heated oxygen sensor detects the amount of oxygen in the exhaust gas compared to the outside air. The oxygen sensor is made of ceramic zirconia. The front oxygen sensor signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. This was performed on a 1997 Nissan Maxima. Please check with your vehicle's repair manual for testing parameters.

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P0155 - Front heated oxygen sensor left bank. The current amperage in the front heated oxygen sensor left bank is out of the normal range. The improper voltage drop signal is entered to ECM through the front heated oxygen sensor heater.

Note:
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