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16/05/2021 5:50 pm
Topic starter
I have a 2008 3.3 V6 Hyundai Sonata with code P0037 (O2 Sensor Heater Circuit low (bank 1 / sensor 2). We are going to be trading it in for a Highlander soon, so im going to replace the O2 sensor myself to save some money. i just am having a blond moment and cant figure out which one to buy. Would that be considered an upstream sensor or downstream sensor? Thanks in advance for the help!!
1 Answer
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16/05/2021 9:17 pm
See below: Sensor #2 is the sensor after the catalytic converter and if you replace it go OEM
