The D4 light on a Honda Accord is the transmission warning light. These come on when there is a malfunction on the transmission. For the problem to be diagnosed properly the vehicle should be taken to a dealership.
Usually when the D4 light flashes it means there is a tranny problem.
Transmission error
It means the car needs servicing.
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 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.
There are lots of ways you could do it. The formula in A1 could be any of these: =D4*0.9 =D4*90% =D4-(D4*10%) =D4-(D4*0.1)
There is a problem with the A/T. Seek professional help.
it means your motor is about too shut down and or is overheating.
It's the transmission computer.you need to replace it.
There is a problem with the transmission and you need to get it to either honda or a mechanic.
transmission trouble for sure
Replace your AT Control Unit (Automatic Transmission Computer)