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1991 Honda Prelude Question: Intermittent check engine light and speedometer doesn't work

 

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ohmega3, 2.0L 4 Cylinder DOHC, Kingsland, GA, June 13, 2010, 20:24
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Hello, I have a 91 prelude, and just recently my check engine light comes on after about 5 to 10 minutes after I start the car. I also notice my speedometer has stopped working as well, I know the two have to be related some how. When the car runs there is no noticeable problems, but the check engine light is on and I know it can't be good. Can someone please help.

Thanks,

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  • Medium-star Best Answer
    patrick mannion from Greg Solow's Engine Room, June 13, 2010, 20:34
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     Master

    The Vehicle Speed Sensor (VSS) on the top of the transmission fails. It is an electrical pulse generator, it is needed fro speedometer operation, cruise control and some fuel injection and automatic transmission functions. Its failure does light the Check Engine light.

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    Visitor, June 14, 2010, 13:42

    Hey Pat thanks for the advice, I'll have it checked out, and also thanks for the savings of $90 for a diagnostic. Thanks so much, til next time, Ohmega3

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    Visitor, November 29, 2010, 06:34

    This is also happining to my honda prlude "89" what do i need to do ,how much$

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  • Answer #2

    Visitor, October 25, 2010, 22:37

    Although this is a delayed answer, if the VSS is bad, then the odometer will also not be working. If it is ONLY the speedometer that is not working, then from what I understand, there is a plastic gear in the cluster that turns the speedometer. That gear wears out and can be replaced to fix the speedometer problem. I have not tried this yet, but it seems to work with other peoples cable-driven Preludes. This would not throw a code to turn on the check engine light though.

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