My service engine light came on and Autozone gave me the code P2646.

What is your question?

I check the gas cap and light went off. The next day light came back on. Could the code be caused by the gas cap? Do i just need to take to dealer? I was told that this is covered by powertrain warranty. I just have to pay 119.00 for them to diagnose. I just dont want to pay unnnecessary money for something so siimple.

How long has your 2014 Chevrolet Malibu had this problem?

for 5 days