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post #1 of 15 (permalink) Old 09-04-2017, 11:20 PM Thread Starter
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Problem with accelerating and excessive fuel consumption.

Hello I have purhased 2011 Sonata Hybrid from USA. I am living in republic of Georgia. I am experiencing the problem with this vehicle and no one can help me locally. Even the dealer.
The vehicle has a hit when the gas engine is starting and switching off. Also it can't accelerate well, I have an impression that something is braking the engine. When accelerating, it has a vibration on the accelerator pedal. I have changed the sparg plugs, I have replaced the air pressure and temperature sensor, but it didn't help. The fuel consumption in the city goes down to 22mpg.
When the vehicle arrived sometime it was showing the error P0C17. The electrician has made a calibration and it is not showing it anymore. Please share your thoughts, I am really tired of this problem.
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post #2 of 15 (permalink) Old 09-05-2017, 11:06 AM
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The 2011's had a firmware update to correct many problems. These article details them.: and New 2011-2012 HSH Owners check for ECU Update

Please confirm with the dealer whether it has been applied to your car.
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post #3 of 15 (permalink) Old 09-05-2017, 01:34 PM
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Was that a Hundai dealer or just a dealer you bought the car from ?
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post #4 of 15 (permalink) Old 09-12-2017, 01:53 PM Thread Starter
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Hi, I have bought the car from IAAI insurance auction.
My dealer is not strong in diagnostics and they even can't tell me if my car has applied this bulletin or not. Can someone help me please, to check if this bulletin was applied? My VIN is KMHEC4A43AB005529. Also which diagnostic tool can be used for update, can we use "Launch"?
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post #5 of 15 (permalink) Old 09-12-2017, 03:50 PM
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Garage
That VIN seems off, but could just be the info available to me. From what I can find it looks like Korean 2010 sonata?

See, Flash, being the fastest isnt always the best if you are wrong.
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post #6 of 15 (permalink) Old 09-12-2017, 09:20 PM
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Have you registered for a My Hyundai account? Once you do and enter the VIN you can look it up yourself.

-> My Hyundai at the top right next to Search

Or you can try this link: - it thinks the VIN you posted is not valid.
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post #7 of 15 (permalink) Old 09-12-2017, 09:36 PM
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There was TSB thta covers installation of Version 2 software package,,

It is 7 modules updated I think it was (too lazy to look),, and couple calibration to be done after completion of programming

Seems to me there is a couple newer select updates I have found with last couple problem children I had..

Quick visual,, make sure coolant bottle at inverter is full of coolant,, needs to be pretty full.. seen them leak at seam where tank assembled, and leak out,, lack of coolant lets inverter get hot, and does subtle stupid stuff..


To do update, see Hyundai dealer,, plug in GDS,, and read ROM,,it'll offer it to you if applicable.. also run all the other modules in the update screen, read all the ROM and update all that offered,, then head back to TSB and do the calibrates as called out

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post #8 of 15 (permalink) Old 09-12-2017, 11:59 PM Thread Starter
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Hi guys I made a mistake, the VIN is: KMHEC4A43BA005529. I tried to check on the links, but I couldn't found this update is done or not. Can you help?
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post #9 of 15 (permalink) Old 09-13-2017, 06:22 AM
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Odd. I just checked my VIN and one of the service campaigns I had done, the water pump rewiring, is missing from Closed Campaigns but it used to be there.

Since you have at least one recall, I'd take it to a Hyundai dealer and specifically ask about the software update. A friend of mine with a 2011 had to pay around $150 to have it done because it was past the warranty period. He said it fixed all of the problems he had with driveability.
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post #10 of 15 (permalink) Old 09-13-2017, 07:00 AM Thread Starter
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But as I said my dealer is very weak, they can't check if the update is done or not, Or if my vehicle needs update or not, I can, t find a same lunguage with them. If some from US could tell me that this upgrade is not done on my vehicle definatelly, then I could push on them.
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