Okay. I bought a used 97 accord se auto. The transmission on it was no good so I got a used one with about 60k miles on it and had my mechanic put it in. Now, the check engine light is on, and once I begin driving it, the d4 light starts blinking. It shifts great, no slipping, drives great. But now my worry is that I wont be able to pass inspection in NJ because of these lights. Any ideas what can be done or what the problem may be?

 

Might be a speed sensor, that's what it was for me... I had my neighbor (who conveniently works at Open Road Honda in Edison) look at it, and the problem was fixed in a heartbeat!

 

Suggestion; Take it back to your mechanic and have him scan the ECU & TCU codes. You should not have to post this question on an internet forum. If a mechanic did the work he should scan the codes for you and let you know what's up. Could be something wrong with the used trans that you bought......if so you might be able to send/take it back.

I know around here if the CEL or TCU warning lights are on they will do a quick scan to determine if it is a public/personal safety issue. If they deem the CEL or TCU code(s) are a safety concern they can and will fail your car.

 

Did you need a new speed sensor? I think I'll be taking it back to my mechanic to pull the codes. Such a pain getting another transmission put in.

 

Does that cause the check engine light to come on also and it runs kinda rough..
by the way where is it located on the car i have a 93 accord lx

 

You could rest the ECU by removing the the ground from the battery for a few minutes. I did this w/ my 97 Cl that i replaced the trans on 2 weeks ago which was shifting ok (Had a bump down shifting from 3-2 and 2-1) until i rest the ECU. Now it shifts just like the original trans.

 

If your check engine light is on you should have the codes read from the ECU before you reset it.

With the 93 Accord there is a self diagnostic procedure that you can do to read the code flashes from the check engine light.

There are a number of threads with step by step instructions on how to do this procedure. I'll do a search and see if I can post a link for you. If I do not post back in a reasonable amount of time you should try and do a search for it as well.

good luck

 

its 100% the transmission shift solenoid i have same car 97 se and did the same: i put in a new transmission and after a while when i was driving the shift solenoid gave out and check engine light came on and d4 started blinking and i noticed when driving car wouldnt drive at its normal power . thing all u got to do is change this
located on top right in front easy to spot on the transmission
they are pretty cheap or u can get them at a junkyard ...

if u go to shucks orilleys and use they free ecu check device that reads system problems when check engine light comes on it will tell you the same thing!