My 2013 Hyundai Sonata is making a ticking noise and the check engine light went on. I have blue link and the error message said INVALID STATE ERROR. What does this mean?

SOURCE: how do you reset the check engine light on hyundai sonata?

Just disconnect your battery for a couple of minutes.

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.

SOURCE: hyundai sonata 4 cyclinder touble code P0171

Sometimes the mass air flow sensor will become clogged with some miniscule particles of dust or whatever else. When you open up your hood somewhere near where the air filter box is, there will be a hose running from that to the engine, the mass air flow sensor should be somewhere in near there. They are easy to remove and should be held in place with a few screws. Make sure not to touch any of the electrical connectors on the inside or allow them to get dirty. I used mass air flow sensor cleaner from the local parts place but it is a bit pricey. There may be some alternative cleaners available that are not as expensive. Take the sensor to a relatively dust free area and spray it all over with the cleaner and allow to dry. At the same time under the hood where the sensor was spray that area as well. Once the sensor has dried out re-install it and you should notice an improvement. If the problem still persists you may need to change your spark plugs, or spark plug wires.

SOURCE: hi i have a 2004 hyundai sonata recently my car

hi from uk may i suggest that first you do some diy checks ? check all tyres are inflated correctly ? then check all wheels are secure? if your steering wheel is not juddering? then you may not have wheel balance problem? also your problem may be one of the engine mountings have failed ie the mounting rubbers have parted from mounting plates this will cause juddering thro out car especially when taking up drive from standing and also as you accelerate and declerate if you are unsure how to check mounts may i suggest you have tyre depot or garage check and report only! as you can do replace mounts diy ? any more info ? come back if you find out fault if you wish help ? hope this helps/inspires you

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SOURCE: 2002 hyundai santa fe - engine noise ticking

The cam chains have developed slack and are slapping on the cam chain guides which helps prevent the cam chains from popping off in case of slack developing . The chain guides are made of some type of plastic material and develop significant wear.