Hyundai check engine light

Tiny
JEPH1123
  • MEMBER
  • 2004 HYUNDAI ACCENT
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 97,500 MILES
'04 Hyundai Accent GT engine light came on, Had O2 sensor changed yesterday, light just came back on today. What does this mean? Thank you for your help!
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Thursday, March 31st, 2011 AT 8:47 PM

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Tiny
WRENCHTECH
  • EXPERT
The "check engine" light is an indicator for a system that monitors many electronic functions in the system, also called the "malfunction indicator lamp" (MIL). It can come on for any of hundreds of different causes from any of the systems that the computer monitors. Some are very important and can lead to further component or engine damage and some are emissions related not as serious but still a problem and need to be repaired.

Your first step is to have the computer scanned to retrieve the trouble codes that were set when the check engine light came on. Those codes will give you specific information about what the computer saw and will get you pointed in the right direction to find your problem. With a 1996 or newer and some 95 cars and you have an AutoZone or Advanced auto parts in your area, they will read them for free. Once you have these code numbers, we can be a lot more specific about what your problem may be.
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Thursday, March 31st, 2011 AT 8:58 PM
Tiny
JEPH1123
  • MEMBER
I just got this car and The previous owner recently had the O2 sensor changed too. I guess I am wondering what could be causing o2 sensors to keep sending a code saying they are bad? If the code is leading to o2 sensor and the sensor is new, what else could it be? Thank you!
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Thursday, March 31st, 2011 AT 10:36 PM
Tiny
WRENCHTECH
  • EXPERT
We don't know that they are. I need the code numbers.
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Thursday, March 31st, 2011 AT 10:41 PM
Tiny
JEPH1123
  • MEMBER
The codes are P2096 and P0442
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Friday, April 1st, 2011 AT 2:58 PM
Tiny
WRENCHTECH
  • EXPERT
I don't know where you're getting your information from but the PO442 is a small leak in the EVAP vapor system which is usually a loose or bad gas cap. The P2096 isn't even a code that applies to your car.
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Friday, April 1st, 2011 AT 4:00 PM

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