hi i have a p38 1999 4.0 carnt get it to take the eka code i know its right because ive used it before ive had some one look at it and they say it is the becm died on me a new one is to dear so if i got a second hand one with keys and door handel all so egnition would it have to be the same code as mine which is a ymc 106050 or does it just have to be a ymc thanks for your time