When i start the car, the "key symbol" in the dashboard didn't light and i try several time until the light of the key appear and the engine work.

SOURCE: Hyundai Sonata 06 engine runs key out ignition in off position

car should be under warranty .. try having a new key made .if that dosent fix it. it's in the key lock maybe a wire loose .

SOURCE: 2000 hyundai tiburon-would not start and bad O2 sensor code

the only way to get your compression back where it should be is changing the rings...and while you're at it; fully service the engine

SOURCE: I own a 1996 Hyundai Accent carburator 1.3 model.

hello, if you car stalls instanly maybe your ignition system has a loose connection or even has a short somewhere. but if it coughing but still trying to idle normally maybe your carb dirty. one thing, some carbs has a solenoid air switch attached on one of its side. if this solenoid is shorted damaged you'll have the same effect. hope this helps.

SOURCE: My '98 S10 ignition switch will click, then work.

first check all cables for corrosion on the battery. then go under the truck and check all cables that are on the starter. if they are clean then replace the starter because the solenoid is going bad.

SOURCE: 2001 Elantra stall, loss of power. Driving at

I am having the exact same problem with my 2001 Hyundai Elantra. I was told that the engine code that comes up when the sensor is on is called "Absolute Pressure In The Manifold". I was told by a "Hyundai Specialist" that when that code comes up it usually means that the seal on the manifold is Fuct. When my mechanic checked that out for me he had noticed that my manifold had 4 cracks in it(can varify cause he showed me). He replaced the manifold and gasket. The car ran fine for about 2-3 days and since then the problem has since come back and my check engine light will no longer go on/off it only stays on. Because of the check engine light always staying on I have noticed that on many occasions my car will hiccup many times in a row. The only way to stop the hiccup I have noticed is to take my foot right of the gas for approx. 2-3 sec then car will continue without hiccup(till it happends all over again). All in all I have been having this problem now for approx. 1 year and if there is somehow someway it could be repaired I would appretiate it.