Yesterday my 92 honda accord lx was running fine, i clean the engine today and when i start the car, check engine lights on and d4 is flashing, whatcould it be? engine keeps running though as if nothing happens.
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!
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This light is indicating a fault in the automatic gear box, it can be excessive slippage (you may feel nothing unusual) or other problems. you must have it scanned by a dealer or ****** repair shop to find out what is causing the light to come on.
The check engine light comes on if there is an issue.But Honda also has preset the Check engine light to come on to remind you of oil changes.If you want to shut the Check engine light off.There is a Yellow Reset Button inside the Fuse panel.
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
on my 95 accord my d4 light used to flash after driving for for an hour or 2 then the speedo would do strange things.so i changed the speed sensor relay [located on the gearbox] and solved the problem.
okay everybody...i did it myself....replaced the main relay and the TCU box..but i didnt use another OKI manufactured TCU..i bought the Denshigiken manufactured one....(this was a 2nd manufacturing of the TCU)....when it first arrived today i opened the module up to check the resistors and capacitors...and noticed the completely different configuration and parts inside...this worried me..but i hooked it up anyways...to my amazement all problems vanished ..and everything works now..(cruise control, shift interlock, D4 light, tranny shift, brake light, intermittent no start, everything that was wrong..must have ran through this stupid little resistor) ......i solved his problem for less than $100.00..and less than an hours work....i can get more of these Main relays and TCUs if someone needs or needs help locating and removing/installing new pieces...email me at firstname.lastname@example.org or call me @816-286-8851..ill be glad to help
Main relay ........$10.00..
10mm deepwell ...$4.00