OK, blue connectors have nothing to do with anything.

Find the ECU. It is a gold coloured box with a few big plugs going into it, behind the passenger's kick panel. It will have a blinky light on top. Each time it blinks long, add ten. Each time it blinks short, add one. Example: long blink, short blink, short blink = 10 + 1 + 1 = code 12. It may show multiple codes.