How To Test And Replace Heated Oxygen Sensor P0141

How to test and replace a Heated Oxygen Sensor P0141.

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P0141: Secondary Heated Oxygen Sensor 2 (Secondary HO2S) Heater Circuit Malfunction. The HO2S detects the oxygen content in the exhaust gas and sends voltage signals to the ECM (the vehicle's computer). Based on these signals, the ECM controls the air/fuel ratio. When the oxygen content is high, the voltage signal is lower. When the oxygen content is low, the voltage is higher. Operating value at idle is .1 - .9 volt.

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