bank 1 O2 sensor?

2002 DODGE INTREPID
120,000 MILES • 6 CYL • 2WD • AUTOMATIC
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KRYSMEN
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Which side of the engine is bank 1; the driver's or passenger side? I need to replace it.
Aug 25, 2008 at 11:07 AM
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SQM
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Hello,

The right side is the bank 1. The one before the catalytic converter is the sensor 1 (upstream) and the one after the catalytic converter is the sensor 2 (down stream).
The upstream sensor is located on the exhaust manifold and down stream sensor is in the exhaust pipe after the catalytic converter.


https://www.2carpros.com/articles/how-an-oxygen-sensor-works
https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor
https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.
Aug 31, 2021 at 11:32 AM