Instrument cluster is blinking d4 speedometer isn't workin and check engine on 1998 Honda Prelude

D4 green light flashes

Asked by for the 1998 Honda Prelude

The d4 light flashing is the warning light for the transmission .
The warning light along with the speedometer not working usally indicates that the vehicle speed sensor is not working .
The speed sensor is located on the top of the transmission and mounts on vertically .

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1 more answer
Have scanned for codes , to avoid wasting money on unnecessary parts. May be a wiring issue.