I have Hyundai sonata 2005 V4. One day while I was driving on the highway, I felt a sudden delay in acceleration and it was like inconsistent (on and off) acceleration for quick seconds and it ran back to normal. Then, a month later, I drove my Hyundai on the snow day and it stalled suddenly while driving on the highway, when I was moving at about 60 mph. The check engine light was on (later found out it was P0733) and the oil pressure light and battery light was on as well. The car did not ignite back immediately after the stall and ultimately, after couple tries the battery died. Then, I put in new battery and the check engine light and other lights were off and car started again. It seemed like disconnecting the battery reset all of the warning lights. Next morning I started my car and it started just fine and when I was driving on the uphill road at 45 mph (it probably shifted to 3rd gear), the car stall again and all three warning lights went back on. I tried to start the car again since I had faith in my new battery but it did not start immediately after the stall. So, I rolled down the car back to the house in neutral and next morning I started the car and it started just fine... but only the check engine light was still on. Now I am scared to drive this… I know it is a long story but I was trying to be as specific as possible. Does anyone have suggestions on what might have gone wrong? Thanks for your time!

SOURCE: Check engine light stays on.

You've made the correct decision. Let the dealership diagnose the issue. They'll tell you EXACTLY what the problem is and what's needed to fix it (parts, labor, tax, time-frame, etc.).

SOURCE: Hyundai Coupe 2.7 V6 surging problem

THANK YOU FOR A PROPER DESCRIPTION OF YOUR PROBLEM.IF YOU DID A ACTUATION TEST SOME WOULD HAVE SHOWN BUT YOUR PROBLEM CAN NOT BE RECTIFIED BY MAIL SO PLSE CALL ME
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PAUL MC G

• 1280 Answers
• Posted on Oct 18, 2009

SOURCE: 2000 Hyundai Sonata GLS V6 - problem started last

Whenever the 'CHECK ENGINE' light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on. You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE and perhaps eventually fix the problem.

PAUL MC G

• 1280 Answers
• Posted on Oct 19, 2009

SOURCE: Engine cut off while driving 2004 Hyundai Sonata.

BEST SOLUTION: Take/Tow your vehicle to an authorized Hyundai dealership and pay the diagnostic fee... they will tell you exactly what the problem is and the cost of parts/labor to fix it... at least this way you'll know what the problem is and what's required to fix it.

SOURCE: 2004 Sonata stalls out for no reason then won't start

My 2004 Sonata is doing the same thing. The engine light comes on and then the engine just dies. My mechanic put it on the diagnostic machine and can't find anything wrong with it. So did the crank angle sensor fix the problem on your car scottyinauss? I am going to print out your input and take it to my mechanic. Thanks.