It could be several things but if it is a constant jerking (repeating) and more noticeable a lower speeds < maybe even pulling to one side ,where you have to hold the wheel a little to the other direction to go straight. I would suspect a bad tire , may not be noticeable just looking at the tire but could have a internal broken belt.
Could be the gears slipping. Might need new gearbox.
If a 2002 Jetta is jerking violently on sharp turns, stop driving the car immediately. This could be a problem with a tie rod, the A frame, or ball joints. Driving the car with this condition could lead to the tire falling off.
It is important for a vehicle to run smoothly, and give the passengers a smooth ride. The cause of this vehicle jerking could be due to lack of electrical flow, lack of fuel or the computer going bad.
If the 1999 Suburban noise is a sort of loud banging noise, the problem could be that the engine have jumped time. Jumping time would cause the noise and jerking in the engine.
Could be low on fluid Have fluid and filter changed - may be an inexpensive fix
Are you sure of the error code? My reference says it's an unknown, as in non-existent, code
If there is no trouble while shifting, then the problem most likely is with the ignition sequence. This could be caused by bad gasoline, a bad timing assembly or faulty spark plugs/wires.
There are a couple of reasons why you car is jerking when you are going below 60. It could be the result of a problem with your transmission, or your fuel pump could be going.
You could have blown your tire or it could have gone flat.
if its doing it only when you slow down it could be a number of things, such as, vacuum hoses,map sensors, of course if it does it whileyour driving too it can also be a vac. hose
check all the little fuses in the fuse box under the hood. trust me 300.00 later and it was a 2.00 fuse
Your previous driving record alone is not probably cause to be pulled over. If you were driving recklessly or in violation of the law, you could be pulled over.