2009 Toyota Camry - Oil and AC link?

I have Vita oil for more than 365 Days, I change to Mobil oil recently, why my engine light is blicking only when A C is turned on

Refer to you owner’s manual regarding the blinking engine light. It may advise to not drive the car at all until the issue is resolved. Ask your shop to read your Camry’s stored diagnostic codes, and post them here.

Most likely the check engine light comes on from something other than changing oil brands. Have the codes read and you can post them back here and maybe someone can help you further.
Most Autoparts stores will scan your vehicle for codes for free.

Thanks for getting back to me, I’ll check them out.