A blog reader recently asked about a Code Alarm remote with FCC ID “GOH-FOUR”.
As it happens, this FCC ID was used on two Code Alarm remote key fobs that have different electronic characteristics . . . so they are not compatible. One transmits a fixed code signal at 315 mHz; the other transmits a rolling code signal at 434 mHz. The higher frequency part was used with some Ford dealer-installed keyless entry systems in addition to Code Alarm aftermarket alarm systems. These two parts look different, so you can choose the correct replacement part by selecting the keyfob that matches your original remote.