2004 Honda Accord Q&A
2004 Honda Accord Question: 04 Honda Accord Transmission "D" light has started blinking.
The transmission control module monitors the operation of the transmission via sensors, and when it determines a fault it will make the lights flash to indicate a fault has been detected. You will need to have the diagnostic codes read out of the transmission control module, then a diagnostic procedure performed to determine the problem. It is not uncommon to have everything work normally when a fault is detected, the systems are very sensitive and can register problems before they effect the operation. - lawrenceg
This is interesting. I also have a 2004 Accord 3.0L V6 Automatic and I just experienced this same problem. I would encourage others who are having transmission to let others know. Does the transmission parts of The difference for me, though, is that the carks 'bucks' slight with downshifting. In addition, it doesn't appear to shift to higher gears during highway travel - thus the engine runs at higher than normal RPM (close to 3.5-4K RPM at around 55MPH). From memory, I'm guessing closer to 2.5k is normal. - PhillyHonda
I have a 98 Honda Civic that recently had trouble with the automatic transmission. It would have trouble down-shifting when coming to stop. I called different mechanic shops and one guy told me it could either be the "shift speed soleniod" located on the top of the transmission, a "transmission control module" located inside the car, or it could be a sensor. So I popped the hood and checked all the connections for all my sensors and found one that had been diconnected. The "engine temperature sensor " had come unplugged so it clicked it back in to place and my transmission worked fine from then on. I confirmed this with a transmission mechanic to make sure I fixed the problem and he said that was the problem. If the computer cant read the engine temp. then it will cause it to not want to go into gear. So, if you are even the least bit mechanically inclined, check your sensors and save the trip to the repair shop. - Visitor
Check your electeical connections closely for the sensor plug for 3 gear and the one for 4 gear. Thats where my problem was. Even if you have to run a temporary parallel line from the last connection to within 1-2 inches of each plug. - Visitor