i tried to switch out my rear brake/turn signal lights on a 2010 jeep for brighter LEDs. the computer didnt like the different current draw so threw errors (blinkers went super fast, normally an indication a turn signal bulb died.. the LED didnt draw enough to convince the computer it was working apparently). wtf try to install better than original parts and the computer says "nope"

also heard putting HID (think thats it) headlights on a lot of computerized vehicles causes problems too. wrong current draw.

love my 2000 XJ, i can fix/upgrade most anything and all it does is keep running.