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Check engine light on?

Tiny
HONG LUC
  • MEMBER
  • 2004 HYUNDAI SONATA
  • 2.7L
  • V6
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
I changed the o2 sensor and the catalytic converter. After I have done all that my check engine light is still on. Can someone tell me what the problem is so I can take it to smog test?

Thanks
Tuesday, July 25th, 2023 AT 10:21 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,573 POSTS
You need to have it scanned in order to retrieve the trouble code that is turning the light on. There are many things that can turn the light on that are not related to those parts. Without the code as a starting point you could actually replace the engine, and still have a light from something in the transmission or fuel system.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
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Wednesday, July 26th, 2023 AT 6:27 AM

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