Is it SPORTS MODE try and press any button located near the shifting assembly
It may not be a bad tcu it may be an electrical problem within the transmission mayb the vss "vehicle speed censor" is going bad or has gone bad you need to check the code you can take it to a parts store but if they dont know how to check the check engine light or the sport light trouble codes its useless the started putting the diagnostic plug under the driver side dash in cars in 1992 so 91 isnt ganna have it i own and drive my 91 accord everyday and my S light is flashing too if you have already fixed it then never mind but if you havnt i can tell you how to check the codes hope this helps
If its a flashing green "S" it means trouble code. Take to auto parts store & let them hook up a diagnostic tool to it to see whats wrong with it.
Yo its the SPorts Button located near the stick u use to change from parkin to drive and all that.. Turn on ur car and press the button it should go off
If pushing the button doesnt help get on fleabay and get a rebuilt tcu unit. Guarantee it. Please dont junk the car over a bad tcu. With minor bugg fixxing this car will usually run past or to 300,000 miles.The transmission control unit is a common problem on these cars when they get older. E-bay is a good source for prices on these rebuilt dont trust a used one its probably bad too.
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