Annoying ping.

I've noticed since buying a Jeep I'm getting this annoying pinging sound. When it pings, a light comes on that appears to resemble a little gas pump. I figured out that if I fill up with gas the light goes off. But two days later, "ping", it's back again. Is this normal? Because it's costing me like $80 every time that light comes on.

Sincerely,
Al Gore

Sent from my SCH-I545 using WAYALIFE mobile app

I am experiencing this same noise as well and exactly at the same frequency, let me know when you find a fix!
Along with the above issue, it would seem like my odometer's calibration is off as well.