How do you fix a jeep error code 12-55?

Answer 1

the code 55 lets you know when all the codes have been presented, as for the code 12 that can be found online by typing in (year) Jeep troublecodes and it should give a brief description. Good luck

Answer 2

12 = battery has been disconnected

27 = Injector #1 output driver does not respond properly to the control signal.

or

Injector #2 output driver does not respond properly to the control signal.

or

Injector #3 output driver does not respond properly to the control signal.

or

Injector #4 output driver does not respond properly to the control signal.

or

Injector #5 output driver does not respond properly to the control signal.

or

Injector #6 output driver does not respond properly to the control signal.

55 = end of code sequence

Answer 3

12 means that the codes have been cleared within the last 50-100 starts and 55 means end of test

Answer 4

call autozone they wil tell you