Every so often, like about once a month maybe twice, my honda wont start. the d4 light will flash and the car wont turn over. i just let it sit for a minute and take the key out and try again. eventually it will go. but such an inconvience. please help
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Re: d4 light will flash and car wont start
Might need to replace your transmission control module located under your pass side floor carpet. Remove the plastic kick panel to the right of the passenger's foot, carefully pull back as much carpet as you can. There you'll see the cage for the ECU and your trans control unit. The trans computer is the smaller one. Good luck.
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d4 light indicates electronic transmission failure but this can b as simple as low transmission or old fluid . change fluid if its dark or watery, before you panic.(( use only honda brand atf,)) if that doesnt work the codes need to b considered this can b done by jumping the two pin connector under or behind the glovebox with a paper clip the d4 light will flash once you turn the ignition on to first position' when dash lights first come on . it will flash then stop then flash again you need to count the first and second separately this will give you 2 diget code look it up exp; honda d4 dtc 34 just say google it , but if i were to guess if not the trans fluid the codes will b for sift selinoids easy fix but no fun to change. good luck. you will need a scanner for the check engine light uncommon for both to show up at the same time two diffrent systems ,disconnect the battery for 30second this will reset the ecm, it maybe a false code and it may not return.
In this case, the fix could be as simple as replacing a Vehicle Speed Sensor (VSS), or it could be as expensive as replacing the Transmission Control Module. Only examination by a competent mechanic can tell you for sure. Honda Owner's Manual tells you, a blinking D4 light indicates an electronic problem relating to the transmission. And, it also states that failure to fix the electronic problem promptly can lead to more expensive mechanical problems. In other words, don't continue to drive it.
you have a transmission fault the D4 light blinks to tell you that there is a transmission problem when the light is blinking the transmission computer put the transmission into limp home mode so it will not shift normally and you should try not to drive it very far when it gets to this stage you need to have the transmission codes check to pin point the problem
d4 is flashing as a trouble code for the automatic transmission... i would say without research that it is a code for a transmission solenoid. maybe while washing the car some water got in and caused a short...these solenoids are usually weatherproof....you could try disconnscting the battery for 30 secs..to clear the trouble code and then start the car. remember you may lose your preset info!