After drive my 2009 E320 Mercedes today I got a "check engine" light.
I then stop at Autozone and they got the code P2031 which is "Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 2".
I just want to know how serious is this problem and if it is a easy to fix for a guy very good DIY as I am. I never worked in this V6 engine before but I did all repairs and adjustments on my three Mercedes 300 SD and other cars that I have. I travel 54 miles everyday to go to work and I want to know if I should continue using my car with this "engine light on" for a while. Car is running normally and can feel nothing wrong while running.
Your feedback is appreciated.
Thanks

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Nyck - TX - USA