Question about 2004 Kia Optima

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My kia is a 2004 optima. I started it and it turned off. And when i started again it turned on but my check engine light was on... whats wrong with my kia..

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  • Kia Master
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Read this please concering the check engine light.

The information below was complied by me, it explains what causes the check engine light to come on and the process of finding the cause.

When the Check Engine light (or Service Engine Soon or small picture of an engine) is turned on, the systems computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible system faults (the gas cap is just one of them) that turn the Check Engine light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen/Oriley and Autozone parts stores (USA only) do this testing for free.

Posted on Feb 10, 2012

  • yadayada
    yadayada Mar 12, 2014

    Sorry but this will require an expert to repair.

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6 Suggested Answers

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Posted on Jan 02, 2017

MobyMech
  • 106 Answers

SOURCE: Engine Check Light - 2006 KIA Optima

Hi

Before you turn out the light you should have a code read carried out just to make sure nothing sinister is going on with the management system.

If the car is running ok then the code will probably either pertian to the O2 sensor, the EVAP system, or a drop in catalytic efficiency, but this isn't set in stone, just the most popular scenarios.

Very best regards

Geordie

Posted on Jun 13, 2008

PyroPCMan
  • 405 Answers

SOURCE: 2002 kia optima wont pass

Reseting the cpu will clear the check engine code however it will not fix the problem that caused the check engine light to come on. The most common cause of failing emissions is the O2 Sensor. This sensor will trigger the check engine light when it is failing. The good news is that the Oxygen senser is pretty cheap and is mounted on your exhuast so it is fairly easy to replace yourself. I suggest replacing your O2 sensor the clear the computer by disconnecting the negative battery terminal and leave it disconnected for a few moments, hook up the negative again and it's all clear. Take your car back threw emmisions and you should be all set.

Hope this helps

Posted on Jun 27, 2008

  • 51 Answers

SOURCE: reset check engine light in a 2004 Kia Sorento

usually you can reset a check engine light buy disconnecting the battery for about 30 minutes.

Posted on Jun 02, 2009

seans46
  • 161 Answers

SOURCE: 2004 KIA Optima LX timing belt/water pump

The thing is your doing the timing belt the water pump is right their with it . it should cost you much more at all besides the cost of the water pump. When doing a timing belt I have a rule that I go by The timing belt/seals =cam , crank , any pulley & tensioner & water pump all get replaced at the same time. I did a t-belt on a Audi A-8 very complex whole front of car has to come off as well, he didnt want to do w-pump & thermostat his thermostat was their as well not even a month later the water pump gave out he had to pay double the price because he didnt want to do it when I had it apart the first time. And make sure mechanic is ase certified . good luck

Posted on Jul 02, 2009

  • 1986 Answers

SOURCE: turn off check engine light on 2004 KIA Sorento

If the computer doesn't detect any further issues during it's next several test cycles, the light should turn off. A test cycle may not be performed unless all the conditions it requires are met (been running for a certain period of time, engine temp, etc). On some cases, can take a week or two to turn off. Otherwise you can get an OBD-II scanner and manually turn off the light if you don't want to go to the dealer

Posted on Sep 14, 2009

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Hi

Before you turn out the light you should have a code read carried out just to make sure nothing sinister is going on with the management system.

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Very best regards

Geordie

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