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
2 answers

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 .

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