Hi,
My car's check engine light is on and the rpm is broken(stays at zero). The code is P0725 and it means TCC does not engaged and probable cause is ignition system. Can anyone tell me what I can do next?

Thanks

 

You can tell us what year/model/engine/tranny you're talking about. It matters.

Basically the tranny computer can't see a tachometer signal. Since your tachometer apparently isn't getting one either, it's probably somewhere upstream in the signal path.

Some years the tachometer signal originates in the distributor. Some years it originates in the engine computer. Some years the engine computer & the tranny computer are together in the same box. Some years don't have a tranny computer. Some years don't have a tachometer. Some years .... ???

 

It is honda accord EX95.

 

Bump for old thread with no answer i have a accord 96 v6 2.7 with p0725 as well both rpm and speedometor dont work my transmision gets "Stuck" and i have to pull hard to change gears. Auto trans