Join Date: Oct 2011
Location: Fishers, IN, USA
2002 Hyundai Sonata 2.4 auto
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2002 Hyundai Sonata 4cyl. About a month ago had a problem with vehicle stalling in drive at stops. Replaced IAC valve, cleaned the air intake manifold & had the fuel system cleaned. Seemed to have fixed the problem with car stalling at idle in drive. Now, the car has begun to randomly stall within 5-10 minutes of startup during a 1st to 2nd gear shift acceleration exceeding 2500 rpms. Examples of this has been accelerating from stop lights and slowing down and accelerating out of turns. The check engine light came on. There were 2 codes read: a IAC high rpm code and a crankshaft sensor malfunction. Recently took it to a private mechanic. They said they could replace the crankshaft sensor for $400, but they said that might not solve the problem. They also said it could be an ECU (engine control unit) in which case a certified Hyundai mechanic would need to determine the best course of action to fix it. I've taken this car to a privately owned mechanic shop and 2 Hyundai dealers with different opinions. The dealers were suggesting $800-$1000 amounts of work which they also said might not fix the problem. I don't want to just keep throwing money down the drain hoping the car is fixed on mechanics guesses. Has anyone experienced this or have any thoughts what could be causing this? Sorry for being long but this has been frustrating
Thanks for the info. I took it to a Hyundai mechanic and he said the same thing. If it's a CPS for the 4 cyl., it's a pretty extensive job labor-wise. He recommended either having the timing belt tightened or replaced depending on it's condition since the sensor is in close proximity to the belt. Btw, my 02 Sonata has only 104k miles and I have taken good care of it with routine maintenance. So this could happen to others with older model Sonatas.
Now, I just have to wait for the check engine code to come back on before they can thoroughly diagnose it. The last mechanic I took the car to cleared the codes without being able to fix the problem!
If I read it correctly you said "The TB "only" has 104k miles on it"
OMG...If that's true when it soon breaks you will have a MAJOR engine repair...
The TBs are to be replaced EVERY 60k miles and I have seen posts of them them failing often around 85k miles...
Just want to keep your Sontata running...
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