adidasguy1080

Honda gurus,

Good evening!

New-to-me 1998 Civic 2-Door Coupe with Automatic Transmission. I bought it knowing 'it has some tranny problems sometimes', so I am looking into those.

Check engine light is on, and the D4 Light blinks at me. I arced the maintenance connector under the passenger dash, and the D4 light does one long blink and then five short blinks. I have read that it means code '15'.

Does anyone know what Code 15? I know I am going to have to replace some things, but it would be awesome if I could know beforehand where the code is being thrown from!

Thanks for your help!

muellersfan

Mainshaft Speed Sensor

adidasguy1080

Thanks so much!

Anyone have any good info concerning replacement of this? I'm a YouTube mechanic, so it really helps me to see someone else do it - or even know where it is. This is different from the speed sensor in and of itself, right?

Thanks - have a great day!