My Hyundai Accent start having aging problems, I try to start and couldn't go any where, finally I got some one to do a jump start and that make it start, I believe it is the generator that stop charging the battery, could you help me how to confirm this. thank you.

I would suggest a compression test to ensure that all the damaged valves were replaced. Replace the MAF sensor as it appears that it is faulty

Does your vehicle have daytime running lights? If so, it's a far more complicated system and you'll probably have to take it to a shop.

You'll have to figure out if it is a fuel or ignition problem.
Check and see if you are getting spark to the plugs first.
Also re-check the computer for codes and see how many are back.
Trouble codes are suggestions, not solid instructions.

Hi, I think you have a bad altinator or eletrical short which drains your battery over night, once you jump start your vehicle the altinator charges your battery enough that it starts all day but if it is parked for longer time the battery drains.

You dont say how much oil your son put in? How did you know the oil was low to start with? over filling the oil by .5 qt isnt going to hurt anything. Its time for a new car.

Starter motor.

P0734 = 4th gear incorrect ratio (that's the torque converter 'lock-up' clutch - inside the converter).
P1401 = doesn't exist for 2002 Hyundai Accent's
P1401 exists for 2000 Accent = DM-TL Air Pump Motor Curent Draw is higher or lower than expected (normal is 17-36 mA). DM-TL = Diagnostic Module for Tank Leakage & is part of the Evaporative Emissions Control System.

These two DTC's are not associated/part of the Accent's Engine Managemenet System (EMS).
Best to have a qualified/certified Hyundai Service Technician properly diagnose this starting problem with your vehicle.

Sounds like a PCM (computer) problem to me also.

hi may i suggest you have alternator output /charging checked also considering age of vehicle ? if origional battery ? have the battery checked for charge storage it may be failing to hold charge which would explain the problem you mention regarding use of h/lights slows starter rotation ?

I removed the cable from the battery, then I turned the ignition key only to the ACC position. I then replaced the cable back on to the battery,and turned the ignition all the way on & my car started and the alarm reset itself. I didn't have to jump start it.