Need help:Check engine light went on with code P2097

Car: 2015 Chevy Malibu, 50k miles;

Error Code:P2097 Post catalyst fuel trim system too rich bank 1;

How it happened: I refueled the car last night with almost empty tank and drove home, on the way home I noticed the check engine light. Car still drives normal.

Additional information: There was a pretty big T storm the day before yesterday.

Questions: Could it be bad fuel? Before going to the dealer, what simple stuff can I try?

submitted by /u/girafferocks
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