Engine code P2A03 on 2006 Suzuki Grand Vitara

What is your question?

Greetings! Sure hope this forum is still active...I'm running out of places to get a good answer. Check engine light on my wife's car came on about 2 weeks ago. Went to Auto Zone for free reading and came up with: P2A03 - 02 Sensor Circuit Range/Performance Bank 2 Sensor 1. I'm not a mechanic (I leave it to the pros) and don't want to be taken by some of the less legit shops for a ride. Can you help? Thank you so much for all of your help!

What makes this problem better or worse?

nothing I am aware of, comes on after car warms

How long has your 2006 Suzuki Grand Vitara had this problem?

several weeks