the original tranny when it died i got no d4 light flashing of any kind. the d4 light comes on when the ceu light flashes for 2 seconds when the ignition is turned to on position. when the lights on the dash light. the shifter is still in park and the p and its box r lit up in red like they should be. doesnt seem to affect the shifting or the transmission at all. just showed up the day the gauge cluster was swapped out and the alarm was armed and disarmed.

the guy that got my car started didnt check the tcu. i will take it back to him to have him check the tcu or check for why that light is flashing. that is the only time it does it. even when the check engine light wasnt coming on with the ground wire ungrounded the d4 flashed when the key was turned to on. he does auto diagnostics he isnt familar with accords. he does mostly high end cars. someone just told me to have him see if he could find the problem and fix it. see if he can figure out why my seatbelt chime and light on the dash r messed up.