TCU Issue - If you are having an issue with your accords "S" light, chances are its your TCU, I recently had this problem my 1991 Honda accord lx. My A/T transmission kept shifting from 3rd to 4th and vise versa. It was due to a faulty compositor in my TCU. I purchased a new TCU off of eBay for $50 and haven’t had the problem since, you can also replace the compositor for $3 but you have to do the work your self. Either way it’s an easy fix, just follow the guide in the link attached above.
Codes Of Failing Parts - This website will help you diagnose your car for whenever you have a check engine light on or when you have a blinking sports light or d4 light.
when the sport light is blinking it will not change gears, the light pops on about a mile after take off & then it feels like your in low gear & the engine is tacked up real high .
its not a bad car ive had worse, but this transmission thing is really buggin me nobody seems to know what is causing it first it was the sport mode then there were times it wouldn't start i would disconnect the battery for a few then it would start fine and shift fine.and then it wouldn't i cant get a diagnostic unless it acting up then as it was acting up i paid to get it diagnosed and he said no codes showed up grrrr. i just dont get it and its driving me freaking nuts. sometimes i got all gears and sometimes i only got d2 and wont shift to 3 or 4 and sometimes it wont downshft to 1 even after it already shifted up through all the gears its like one minute it works and next time through the gears it defaults darn near got me killed by a tractor trailer .. arghhhhh. if any one knows what this is please e mail me at peace67man@msn.com asap i am looking for a used transmission in another window while i type i just need to do something for me and my son end up in the obituaries..
the transmission will not run through all gears it has a switch on the shifter that once depressed it goes into sport mode and now it is stuck in sports mode
- Robert W.,
Lomita, CA, US
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when the sport light is blinking it will not change gears, the light pops on about a mile after take off & then it feels like your in low gear & the engine is tacked up real high .
- jlowe, Walnut Cove, NC, US