fairly significant
Typical Repair Cost:
Average Mileage:
90,350 miles
Total Complaints:
3 complaints

Most Common Solutions:

  1. not sure (2 reports)
  2. replace o2 sensor (1 reports)
2005 Hyundai Sonata engine problems

engine problem

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2005 Hyundai Sonata Owner Comments

problem #3

Aug 012015

Sonata LX V6

  • Automatic transmission
  • 75,000 miles


I'm still trying to save up to get this done at the same time I get the timing belt replaced...

- chrissmithvt89, Rexburg, ID, US

problem #2

Jan 012014


  • Automatic transmission
  • 90,000 miles

I have read on other sites that this is a chronic problem on some Hyundais. When it first started, it prevented me from getting my car State inspected because it prevented the internal computer from sending an emissions reading. I spent a day and $350 at the dealership while a mechanic sat in my car and ran the engine at different speeds until he got the light to go out. Since then, it comes off and on intermittently. I have been told that on some cars this happens after a repair or an accident; the light goes on and then goes off after driven a few hundred miles at various speeds. With my car, there is no consistency. It comes on and then after a few days or weeks it goes off. I just ignore it now. I just wonder what if there really is something wrong with the engine and I ignore it, how will I know???

- Michael H., Matawan, NJ, US

problem #1

Apr 252012

Sonata LX V6

  • Automatic transmission
  • 106,000 miles

Dealer kept car 2 days to check hot and cold condition and could not find the problem and charged $100 to reset the light.

Light still comes on after 3-5 weeks later, it will turn off only to come back on again!

Coincident when AC on or passing a car freeway tends to come on then .......... but not always?

- Steven Y., Ocenaside, CA, US

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