Famous Will O2 Sensor Cause Check Engine Light References. On my vehicle this was the passenger side, it may vary on your vehicle so. All sensors will be on your exhaust either before or after the catalytic converter.
When the o2 sensor fails, it can affect the performance of other components in the vehicle ‘s emission control system, such as the catalytic converter. Once the chip receives the code, it turns on the check engine light because it. My sensor was bank 1 (so upstream of the catalytic) and sensor 1 ( on the exhaust side of cylinder 1).
