Hello,

My girlfriend's 93 Honda Accord EX recently started having an issue where she would be driving and suddenly the CEL and D4 start flashing and the car shakes real bad (assuming to be from low RPM). She says it stays this way until she turns the car off and back on, and then it drives like normal again after that. It was pretty rare that it was doing this, maybe once a week, but now it's happening almost every day or two, so I'm guessing the problem isn't going away on its own, lol.

I checked the trouble codes after the first couple of times it happened and the only code I got was one about the temperature sensor. The car hasn't overheated and always runs cool, so I guess maybe the temp sensor that the ECM uses is malfunctioning and causing it to give a bad air/fuel mixture? Seems weird that the D4 light is flashing at the same time though and makes me think it may be more of a general ECM failure or even transmission problems.

Any suggestions are greatly appreciated before I start buying parts and wasting time.

Thanks!

 

try replacing the temp sensor and see if that fixes it