Question about 2006 Hyundai Sonata

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The check engine light comes on

We have taken our car to the dealership twice inregard to this problem. It seems to occur after a bout of heavy driving at legal but high speeds. The first time we took it to the dealership they cleaned the connector to the transmission (I think). Within a few days it was back on. We took it back. They said they could find any problem but that they would reprogram this part. Again it reappeared after a few days while on a trip. It went off during our stay but came on again while driving on the highway. The car is still under warranty. How should we proceed.

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I just had this problem with my 06 Sonata. I had first taken it to Tires Plus for the engine diagnostic. Their codes came back as me needing new spark plugs and engine coils, which did not sound right to me. I am a 36 yo female, but I know enough about cars to know that these parts are good up to 100,000 miles. So I took my car to the dealership. Before they even did the diagnostic, they told me what the problem was becasue it was making a ticking noise and the check engine light would start to blink after about a minute of driving and it sounded like it was backfiring. The problem that cause the check engine light to come on was that the Flywheel was literally splitting apart and it and the sensor needed to be replaced. This was still under warranty. They fixed the probalem and the check engine light has not come back on and the noise stopped and this was going on 3 weeks ago. I suggest you have them check/test the Flywheel and sensor.

Posted on Dec 15, 2008

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Leave car with them ( or reputable tech) to drive as you did when you did and replicate the problem....a good tech should find the code and its relation to vehicle speed/temp/gear selected..a/c on etc to close gap on issue....high speed codes often catalytic converter/O2 sensor/VSS ...or otehr related..does it run different when showing codes?

Posted on Dec 08, 2008

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