Question about 2008 Hyundai Sonata

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Took my car an 08 Hyundai Sonata for an oil change to the dealer and they told us there was sludge in the engine we have been keeping up with oil changes ,is there a defect with the sonata's engin

Check engine light goes on car has 65,000 miles on it, was told engine has sludge in it Why? it's only 4yrs old we do reg oil changes. Is there a prob with the 2008 sonata engines

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I doubt you have sludge in your engine since oil has detergent in it to prevent this. I would stay away from this dealer.

Posted on Jan 23, 2013

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Umm.. no. There was a recall years ago for the brake lamp switch as the old style failed very easily. Check your nearest dealer on this.

Robert Cole.. There is little if any detergent in modern oils. Sludging is a problem with not frequent enough oil changes (absolute minimum 7,500 miles), or inferior oil filter. It is known that aftermarket (inferior) oil filters can (and will) cause sludge buildup in the engine.

Willin678.. No this is another issue, totally unrelated to sludge or the engine in general. There was a shift issue that was/is resolved with a sensor and harness replacement in the transmission, but that has nothing to do with sludge in an engine.

OP.. No, there is not a problem with the sonata engine. See my above comments. I wish you luck and recommend you go to another dealer and see if you get the same recommendation. If so I would suggest the offered de-sludge service and use a hyundai oil filter and for the next 15k miles do oil and filter changes every 3,000 miles.

Posted on Oct 31, 2013

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Posted on Jan 02, 2017

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SOURCE: check engine light and how to diagnois and reset 1999 Hyundai Sonata

I had same problem and my repair shop just replaced a sensor in the tranny. Said it was a defect by Hyundai,but they won't recall it.

Posted on Oct 21, 2008

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SOURCE: 2006 Hyundai Sonata brake switche

hyundai bumper to bumper warranty is 5yrs 60k miles with 100k powertrain for original owner. unless you have an extended warranty it is not covered. there is actually a tsb for adjustment on the brake lamp switch

Posted on Mar 07, 2009

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Sonata spark plugs


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Code read p0011 the check engine light went out but the temperature gage still goes up rapidly on 08 Hyundai sonata


Timing is to far advanced causing vehicle to run hotter than normal you'll need to take it to a dealer it can be a few items causing this ecu unit faulty sensors or oil valve hope this helps

Mar 17, 2015 | 2008 Hyundai Sonata

1 Answer

Oil light on in car and front passenager side of motor tapping i change oil and filter what to do


it may be sludged in the sump blocking the pickup you need to take the sump pan off and clean it and the oil pump pick up do not drive with the oil light on will damage the engine

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1 Answer

Took my car an 08 Hyundai Sonata for an oil change to the dealer and they told us there was sludge in the engine we have been keeping up with oil changes ,is there a defect with the sonata's engin


There are two main causes for sludge, not changing the oil and filter at regular times, and not running the engine long enough to get it hot.
You might want to get a second opinion from a shop other than the dealer. The dealer may have a sales promotion on engine flushes this month.

Jan 22, 2013 | 2008 Hyundai Sonata

1 Answer

At 28,066 dealer oil change. At 28,778 dealer flushed engine to remove sludge build up and changed oil. At 30,835 miles inspection, dealer flushed engine to clean out sludge and changed oil. At 34,630...


First dealer was NOT doing you any justice. Next oil change run a can of GUNK engine flush let idle 5-10 mins then change Oil & Filter and use a good oil like Castrol or Valvoline 10w-30. You won't have "supposed" sludge build up.

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1 Answer

TPMS light on 08 hyundai sonata


You might check to see that the tire pressure is correct on all of your tires. Advance auto parts has a scanner they will loan you to clear this code yourself.

Dec 21, 2009 | 2008 Hyundai Sonata

1 Answer

I have a 2006 Sonata and I took it in for 30K service. Our manual says that it needs itsnual was out of date. oil changed; air, oil and fuel filter replaced, and other systems inspected. It says to...


There must be a 1-800 number in your owner's manual. Call them and ask if there has been any changes to the maintenance schedule for your car and if so, what changed and when. They will tell you and then you will have an answer to your question but my guess is you are on the right track. Hope this helps.

Sep 09, 2009 | 2006 Hyundai Sonata

1 Answer

Premature oil pump failure 04 A4 3.0 Quattro


Absolutely - the 1.8T engine is known for sludging issues. If they diagnosed oil sludge then your engine is covered no matter the mileage. The oil sludge builds up in the 1.8T no matter how well cared for it is, and the sludge can block the oil pickup screen on the oil pump (it's an extremely fine mesh), causing oil starvation and taking out the engine in the process.

Go to www.audiforums.com and do a search there for "oil sludge" and the information will come up. You can learn all about it there. But if your engine has the sludging, and you have receipts proving the oil was changed at the proper intervals, you will get a new engine free of charge - one of the members there is an Audi technician and I remember him posting that he'd changed out a 180k mile engine under warranty due to sludge.

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2 Answers

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i would because if there ever really is a problem you won't know because the light is already on

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My 2006 hyundai sonata alarm keeps going off


One word:

Dealer.

Next time just disconnect the battery until you get it towed as this is a warranty item. I'll bet some wondered if this was a prank question like I did, right?

Nov 17, 2008 | 2006 Hyundai Sonata

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