D4 blinking?

[h22cord]

Anyone have an idea of why the D4 in my car is blinking, only does it once the car is warmed up.

[AccordAnimal]

I believe these are transmission error codes... Is the car running any different. You might want to check the diagnostics...

[hpaccord91]

do a drain and fill using honda atf ONLY and then go a head and check all wiring on the tranny casing if not check the tcu,and d4 is blinking check at high speed if u feel the car is in overdrive on the highway and everything is ok i would go a head and do the drain and fill no flushes using honda atf only and they should give u a washer when u do the drain and fill 2.5 quarts it takes when u do the drain and fill

add 2 quarts start up car shift from p-1 slowly letting the fluid run through tranny and keep doing it then let it run and add the .5 quarts while its runninthen repeat park-1 letting all sgufts click in then change it again in one month ,but check all electrical component on tranny casing and last check tcu

[93accordexcoupe]

TCU, the smaller gold box on the right under the passenger side kick boards (feet area).

[sj960]

you check the tcu codes just as you check ecu codes, there is a blue harness by the passenger side kick panel, count the blinks, etc... search for retreiving tcu or ecu codes

[AccordAnimal]

Just FYI

ECU - Engine
TCU- Transmission

[i_love_cb7]

Anyone have a list of the TCU codes??

[xfactortype1]

any updates?