A flashing D4 light on Honda Accords is commonly the result of a bad speed sensor. The speed sensor is located on the transmission and sends a signal to the speedometer and a signal telling the transmission when to shift.
it means your motor is about too shut down and or is overheating.
transmission trouble for sure
speed sensor is out or is going out. your speedometer is out too right?
The D4 light on a Honda Accord is the symbol for the 'check transmission' light. This light appears when the computer senses something wrong in the drivetrain. The computer should be diagnosed at a proper repair shop in order to source out what exactly is causing the problem.
A flashing D4 light indicates a problem with the transmission. It may just need the transmission fluid changed or it may be a more serious problem. I Recommend you seek professional help and do not drive this vehicle until you get the problem repaired or you may do serious damage to the transmission.
The D4 light flashes indicating a malfunction with the transmission operation. You'll need to have it diagnosed by a mechanic with a scan tool to determine exactly why the light is flashing.
Tranny failure or shift solenoid failure.
Usually when the D4 light flashes it means there is a tranny problem.
Means something is wrong with your transmission. Get it fixed ASAP! I just fixed this on my 95 legend it was a speed sensor $225.00 repair yea
Code 12 is a faulty EGR valve. You need to clean or replace the EGR valve of all carbon. The exhaust passage on which the EGR is mounted needs to be cleaned of carbon deposit as well. The flashing D4 light indicates a transmission problem. This needs to be looked at by a professional.
Transmission problem. Take it to a professional for repair.
the d4 flashes when the ecu has detected a problem you will have to get the codes pulled from the ecu to diagnose the problem or switch off the ignition leave for a few seconds then restart should go away. Make sure the car is fully stopped between changes from reverse to drive.