Question about 1991 Honda Accord

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My speeodometer on my 1991 honda doesnt work a green "s" blinks a n my check engine light comes on

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The S light is blinking to let you know the transmission control unit (TCU) has found an issue in your system. Your check engine light will come on after you have reached a higher speed (45-50+mph) and then slow back down below that mark. Right?

The resolution to your problem is to replace the vehicle speed sensor which is located on the back side of the transmission. See picture below...taken from the passengers side just above the fuse box in the engine compartment.


my speeodometer on my 1991 honda doesnt work a - 7be1bbd.jpg
If you want to replace it yourself, you can pick one up for a reasonable price on ebay. Here is how to do it. First remove the big rubber tube that connects your air filter box to your intake manifold (you can see it in the top of the picture above). Next, get a 1/4" 10mm socket with an extension bar and an adapter to 3/8" socket with the 3/8" rachet (see pic below). The 1/4 rachet will work too, but it will be much harder to twist of the bolts with the smaller wrench. This is the perfect size to get in there and do what you need to do. There are two bolts that connect the sensor to the transmission...you can barely see one of them in the pic. It's also holding that piece of metal that the electical connectors are attached to. You might run into an issue of that bar being in the way of your socket getting over that bolt right at the bottom. I would make sure you can get in there are remove that bold before you order your part. I had to use an air hammer to punch mine out of the way, but you might be lucky. Anyway, just take that that bolt out, along with the one on the other side and pull the sensor along with the pin (you'll see it when you're in there). Put the new pin in from the new sensor (should come with one, if not use the old one), then put the new sensor on, bolt every think back on, reconnect your wiring, and you're in business!


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Posted on Oct 07, 2010

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I have a 1991 honda accord lx the green s light is blinking the speedometer stop working and the engine light comes on.i replaced the vss but the problem still persists.what could it be?


Scan the computer for the trouble code that the check engine light may have registered. Maybe that will point to the problem. What is the green s light for?

Nov 03, 2012 | 1991 Honda Accord

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Flashing S button 1991 Honda accord


the flashing S light on your car is your tcu "transmission control unit" sending a trouble code to your dash this could mean alot of differant things if im not mistaken it will be an electrical problem not mechanical. is your speedometer just randomly jumping? the reason i ask is i drive a 91 as well and my S light is blinking and my speedometer jumps and sometimes doesnt work at all the the code for the S or tcu is 4 which is the vss "vehicle speed censor" eventually your check engine light will probably come on and if the code is 17 then its your vss as well but you can check the code by getting either a paper clip or small wire and using it as a jumper wire there is a little blue wiring harness on the passenger side of your car under the glove box use the paper clip or wire and plug them in "dont worry you wont get shocked ive done this plenty of times and in the rapair manual it tells you to do this" when you do this make sure the paper clip or wire is secure and put you key in the ignition and turn it to where your dash lights up but dont start the car the S light will start to blink count the blinks "1 long blink is 10, 1 small blink is 1" example if the light stays on for a couple of seconds and turns off and then blinks 4 times that would be code 14, if your check engine light blinks count that as well if you need help with checking any of it there is a video on you tube i believe the title is how do you check the check engine light on a 91 honda accord. or something of that nature. if you get the codes tell me what they are I may be able to find them and get more specific about what is goin on I hope this helps

Oct 18, 2011 | 1991 Honda Accord

2 Answers

Have a 91 honda accord. experiencing dramtic hesitation when accelerating but check engine light comes on and problem dissapears. Once you stop for a short period of time check engine light goes off and...


Sounds like your O2 sensor is malfunctioning. When the check engine light comes on, the computer goes into a preset mode bypassing the O2 sensor and that's why it suddenly runs good. Have the O2 sensor checked. You can also have the trouble codes read and they should point you in the same direction.

Jan 22, 2011 | 1991 Honda Accord

1 Answer

What does blinking


The flashing "green S" is a sign that the transmission computer has picked up a problem with your transmission or speed sensor. The problem could be a simple electrical problem or a expensive mechanical problem. Either way you will have to get the car scanned and take it from there.

Jun 05, 2010 | 1991 Honda Accord

1 Answer

I have a 1997 honda accord lx 6 cylinder 24 valve engine that the check engine light is on and the D4 light was blinking yellow and then now is blinking green. what could be the problem?


The check engine light comes on if there is an issue.But Honda also has preset the Check engine light to come on to remind you of oil changes.If you want to shut the Check engine light off.There is a Yellow Reset Button inside the Fuse panel.

Apr 22, 2010 | 1997 Honda Accord

1 Answer

Green "S" Blinking


Please take the car for a check it is OBD I compliant.

Aug 10, 2009 | 1991 Honda Accord

2 Answers

CHECK ENGINE LIGHT


I had the same problem on 1991 Honda Accord! It was the old AT fluid. I changed the fluid and all problems vanished! I had asked a Honda mechanic at first problem and he said make sure the AT fluid is good! Happy Honda Owner

Jan 22, 2009 | 1991 Honda Accord

1 Answer

1991 HONDA ACCORD 178000 MILES RUNS GREAT LOOKS GOOD. wILL NOT COME OUT OF SPORTS MODE AND CHECK ENGIEN LIGHT WILL NOT GO OFF.. CAN YOU HELP


maybe computer under the passenger side floor board. If the sport light is flashing, then it could be the speed sensor. This link can show you how to check the check engine light on this car: http://troublecodes.net/honda/ You need to find the blue plug and insert a jumper wire, then you need to count the blinks in the led lights, and then compare it to the trouble codes. Carefully pay attention to the blinks, some will be short and others long. Long I think are 10s and shorts are ones. Once you get the code, then scroll to the bottom of the page and you will see the OBD1 codes, that is the one you need. Hope this helps somebody.

Dec 10, 2008 | 1991 Honda Accord

2 Answers

Speed sensor and overdrive


OVERDRIVE ENGAGEMENT IS TIED TO THE SPEED SENSOR SIGNAL, THE SYSTEM WILL NOT GO INTO OD UNTIL THE CAR REACHES A CERTAIN SPEED, IN MOST CASES AROUND 35-40 MPH, THE SPEED SENSOR SIGNAL TELLS THE ECU WHEN THE CORRECT SPEED HAS BEEN REACHED.

Oct 01, 2008 | 1991 Honda Accord

1 Answer

3 problems speed sensor, check engine light, light on instrument panel


I have a 1991 Accord EX with the same problem.
The speedometer does not work at all and the "S" light continues to flash. I took a chance and went to my local auto wrecker and bought a used VSS (speed sensor) for $20 and that fixed my problem.
Ken
Canada

Jun 09, 2008 | 1991 Honda Accord

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