The D4 light is a transmission code light for those cars probbly reading the speedometer going out and the check engine light the same. Have the codes checked or simply replace it. Here is one of many places to find it (just to give you a price range) http://www.bing.com/shopping/search?q=92%20prelude%20speedomotor&qpvt=92+prelude+speedomotor best of luck
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