Need help diagnosing, could be a sensor

Need help diagnosing, could be a sensor

Posted in the Hyundai Sonata Forum

The Fugmobile

Estero, FL

#1 Dec 16, 2008
So... i had been driving back from a 2 1/2 hour drive in my '01 sonata. everything was fine until i was almost home. i pulled into a gas station for a pit stop and my idle went crazy. up to about 4.5k. i freaked out, and turned it off. when i started it back up it did it again, so i threw it into drive and it was fine. a few weeks later, while i was driving something else went hay-wire. my car could only accelrate... it could idle at the speed i wanted it to. accelerate, decel, accel, decel. i put it on the computer and 5 things came up. i had mass air sensor, throttle position sensor, another air sensor, and some other things that even the guy at the shop didnt know what they ment. we wiped the computer and they told me to come back when the check light came back on... but it never did. the problem still persists. if anyone could help me with this, i would be thrilled, because i just cannot figure out what it is... and am not in a position to be wasting money on parts i dont need. Thanks!!
Lemon in Ohio

Marion, OH

#2 Sep 27, 2009
I bought my 2000 Sonata new in 1999 and I have had
problems with the check engine light from the time
I owned it. First there was a recall on the computer, then the O2 sensors, then the Air bags
had to be rewired under the front seats. Oxyen
sensors, mass air-flow sensors, rear wheel bearings went bad. It now has something going on
with the check engine light coming on. Taking off
slow to get up to speed and jerking. I guess it's
another (some kind of bad sensor) one of many. I have replaced the fuel pump,fuel filter,fuel relays,EMC relay, new spark plugs, new spark plug
wires, had two different fuel pumps replaced and
the strainers. Always something, I think that Hyundai should replace every Sensor that goes bad
on these cars because they have been a big problem
on their Sonata's from day one. They have had recalls after recalls on the Oxygen Sensors.

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