actually, i forgot u had a 93 accord. teh blinking system only came until the 90 accord model.

So here's what u gotta do. Dont' take off that carpet.

Right behind teh glove box (u dont have to take it out) is a two wire connector, pull that out. Its just a female socket w/ no male end.

and when teh check engine light comes on, do not turn off the car, and jump the connector w/ a paper clip (stick each end of the paper clip in each insert of the connector)

then the Check Engine Light will blink a certain number of times.
First u'll have long blinks adn then quick short blinks.

for example. if it blinks 1 long blink and 5 short blinks. its a code 15
if it blinke 4 long blinks and 1 short blink. its code 41.

tell him to find out what that code is.

im' pretty sure its code 17, which is the speed sensor, but have him make sure.