Toyota Repair: Engine Light, fuse box, obdi

Question
Can I reset my engine light and how can I do it
I have a 1993 Toyota Previa that I had a all new
muffler and catalityte replaced but the engine light came on and the guy at the shop said he can not get it to turn off.He said the O2 sensores are working properly

Answer
This is the early OBDI system and the code can be cleared by removing the EFI fuse from the fuse box, hint: it's located under the cover above the radio on the top of the dash.
If the light comes back on let me know and I will help you diagnose the problem.