Code 20 ELD Help

I searched but found no straight answer. I put a b18a1 into my 93 teg. (crashed my 91 and had a 93 shell and i needed a car so i just put the motor in there.) My brother had the car before me and has a b20 vtec with an apexi, and had no prob with this. Ive searched and im pretty sure that when they took the apexi out it isnt making it throw this code. Are the alternators different that the obd0 throw more amps idk. Is it safe to drive with this code? Thanks to anyone who throws in there opinion. Its appreciated and I hope it helps others having the same probs

open your fuse box in you engine compartment and the bigger piece on the left is what you need to replace. its called a load detector :read: