Question about 1991 Honda Accord

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1991 Honda Accord - "S" light on steady

S light had been flashing off and on, most often when the car is really cold. Example it froze over night, car won't shift out of first gear, once the car heats for awhile and then you turn it off the S light would turn off. When you restarted the car it would shift and run fine. Went below freezing tonight and the S light is staying on and car is not shifting out of first gear.

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  • amresume04 Feb 18, 2009

    replaced TCU, could not find one on EBAY but got a rebuilt one. No more transmission or "S" light problems. Thanks

  • justin barath May 11, 2010

    does your car have a factory security system

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  • 59 Answers

It is without question your TMU (Transmission Control Unit) It is located behind the passenger side kick panel. You can buy them on EBay for about 79.00 with exchange it will have a burnt diode and is a common honda problem.


Lugnut61

Posted on Feb 10, 2009

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Apr 27, 2010 | 1991 Honda Accord

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1991 honda accord idles funny and feels like its running hard at about 60 mph check engine light also comes on once i hit that speed


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1 long = x10
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Please check the light and respond as to whether or not the flashing is steady or not. If not please include the code that is being flashed. Also, include model of the vehicle.

Oct 02, 2009 | 1991 Honda Accord

1 Answer

1991 Honda Accord Trans s light


Mine did the same thing. turns out i needed to change the gear selector. But it can be a number of problems. You have to check for a code in your ECU, which is under the passenger side carpet. Its better if you have a mechanic look at it though. Hope this helps a little bit. 

Mar 06, 2009 | 1991 Honda Accord

2 Answers

1991 Honda Accord "S" light on steady


It's the transmission computer.Is located under the front carpet on the passenger side.
I had the same problem.

Take care

Carlos Bentancor
carlosbentancor@verizon.net

Jan 31, 2009 | 1991 Honda Accord

3 Answers

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A green flashing "S" is similar to a check engine light. It is telling you that something in or on your transmission is not functioning correctly, such as the speed sensor or shift control solenoids. If it starts flashing and the speedometer stops working or the transmission shifts weird, take it to a mechanic.

Jul 17, 2008 | 1991 Honda Accord

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