D4 green light flashes
Honda Q&AAsk Your Question
1998 Honda Prelude Question: Instrument cluster is blinking d4 speedometer isn't workin and check engine
Answer #1Aggieland Automotive (9 Answers) , College Station, TX - (979) 404-2728aggielandautomotive November 24, 2013, 15:50Enthusiast
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 .
Answer #2ziptie12 November 24, 2013, 20:13Master
Have scanned for codes , to avoid wasting money on unnecessary parts. May be a wiring issue.