Hey all, I had an issue earlier today with my 91 accord lx. I was going down the road when my S light came on and it kinda felt like it shifted down, after like 5 seconds or so it went back off and the car was fine. It did this at least 3 times today, so I am unsure of what the problem would be. The D4 light was solid and was not blinking or anything, just the S light came on. Is this limp mode maybe? Could it be the TCU? I replaced the TCU before with a used one a couple of years ago. I would love any assistance in finding out what is going on. Thanks!!

 

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