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What is bank 1 clinder 1 need to know wich sensor

Vehicle: kia rio DGI 2013 1.6cc

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P0030 Heater control circuit Bank 1 Sensor 1

You have only 2 oxygen sensor, and 1 Bank1. There is a sensor 1 and a sensor 2, Sensor 1 are he upstream 02 sensor which is before the catalytic, Sensor 2 are downstream 02 sensor or catalytic monitor sensor.So you investigate the first 02 sensor. near the engine

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