...inhibitor switch (automatic)? I have a 1993 Subaru Legacy AWD automatic with a Check Engine Light that is on. I connected the green connectors and received code 51 - Neutral switch (manual transmission)/inhibitor switch (automatic transmission). How difficult is it to replace this part and how expensive is the part? I've never done one of these before but I'm handy with a wrench and can do many "simple" repairs. If it involves tearing down an engine or pulling a transmission, I cannot do that. Please help me figure out how severe this problem is. THANKS!