@ericalzablon: Sensor 1 – Upstream / Before the catalyst Sensor 1 is installed before the catalyst and is mainly used by the ECU to evaluate the oxygen concentration in the exhaust gases and make adjustments to the air/fuel mixture. A failure in this sensor can directly affect fuel control, generate rich or poor mixture, increase fuel consumption, unstable throttle, loss of power and Check Engine light. P0130 – General fault in the oxygen sensor circuit Banco 1 Sensor 1. P0131 – Low signal or voltage from the oxygen sensor Banco 1 Sensor 1. P0132 – High signal or voltage from the oxygen sensor Banco 1 Sensor 1. P0133 – Too slow response from the oxygen sensor Banco 1 Sensor 1. P0134 – The ECU does not detect proper activity or variation in Sensor 1. P0135 – Fault in the heater circuit of the oxygen sensor Banco 1 Sensor 1. Sensor 2 – Downstream / After the catalyst Sensor 2 is installed after the catalyst and its main function is to allow the ECU to monitor the behavior of the catalyst and verify its ability to store and process oxygen. A failure in this sensor may not produce severe driving symptoms, but it can trigger the Check Engine light, alter emission monitoring, and hinder the correct evaluation of the catalyst's efficiency. P0136 – General fault in the oxygen sensor circuit Banco 1 Sensor 2. P0137 – Low signal or voltage from the oxygen sensor Banco 1 Sensor 2. P0138 – High signal or voltage from the oxygen sensor Banco 1 Sensor 2. P0139 – Too slow response from the oxygen sensor Banco 1 Sensor 2. P0140 – The ECU does not detect proper activity in Sensor 2. P0141 – Fault in the heater circuit of the oxygen sensor Banco 1 Sensor 2. #fyp #viral #tiktok

Erical Zablon

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Thursday 13 August 2026 04:14:37 GMT