joel323 wrote:Remove the asr/abs control module and see if it takes the car out of limp mode. It should run and drive fine without it.
If it does you know that module is your problem.
This, plus shoving your head in places where electrics are stored, like glovesbox, kick panel, under seats, fuse block, and trunk. Listen for any buzzing or relays clicking over, especially when you move wire bundles. Anywhere that sees heat can corrode or the shielding can become brittle and cause a short, so I would personally start at the battery side and work backwards from greatest to least power consumption/flow. So Battery > Fuses > ECU > ABS/Trac modules > Other bullshit. Depending on how the car is actually set up, and if there's anything actively preventing it from working if you do this, but I'd start unplugging the unessentials, like radio, seats, windows, defroster, etc. Whether by directly unplugging the box that controls it or swiping the fuse is up to you.
One paper towel roll and one ear plug will help with this.