My 99 accord coupe f23a4 ulev vtech has a check engine light for a few things i fixed and replaced the distributor vtech solenoid plugs and wires and the ecm and had it reprogramed at honda and tested the resistance on all of the wires and the check engine light comes back on with the same code after all of that

 

What codes? Cant help much unless the DTC codes are posted

 

P1381 the only thing that i have not replaced that could be the problem is when i had the battery tested there was a slight ripple in the alternator so thats my next step unless you have another idea that might be the problem

 

https://honda-tech.com/forums/honda-accord-1990-2002-2/2000-accord-4cyl-p1381-2813513/
Sounds like your altenator..

 

Ok so i replaced the alternator and it was ok for about 30 miles the the check engine light came back on so now im at a stand still on what els it could be