If you don't have an OBD2 scan tool, the ScanToolMX is pretty good - I have the Bluetooth version and use it with Torque, but the WiFi one also works with Apple devices (iPad/iPhone/etc).
It's normally $119.95, but is currently on sale for $99.95.
https://www.scantool.net/obdlink-mx-wifi/
You'll note there's no "referral" link there, I get nothing out of this, I just thought if people were interested, they could take advantage of this sale price while it lasts.