2000 Honda Accord Jerking

While I was driving today Honda Accord 2000 LX my car started jerking and D4 started flashing...I drove home on D3 with jerks....what is wrong?

Sounds like you have a transmission problem there! Unfortunately this is something that would need to be diagnosed in person by a technician. You could have something simple like a transmission electrical component that is going bad, or worse such as need a complete overhaul. Usually with a problem like this the transmission needs to be removed, disassembled and diagnosed.

Have your transmission diagnose to find out what is wrong.