Question about 2002 Kia Optima

2 Answers

2002 kia optima wont pass emissions. check engine light was on, then turned off. how to reset computer

Posted by on

  • Anonymous Mar 18, 2014

    odometer and key light sta on after key removed
    after several days battery goes dead

  • Anonymous Mar 25, 2014

    I have a 1996 Toyota and when I turn the key (with out starting ) the check engine does not turn on and it wont pass emission test because if it what may be causing this



2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 405 Answers

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


Trouble is the O2 sensor on this model is NKT cheap, even at trade price you are talking £127.00, so i dare not go to a dealer for a genuine one as they are asking nearly £180.00 ofr the same thing.
So being as it only flashes the fault up once a month, i bought a cheap OBD2 monitor [£25.00] and reset the light this way, as using your method, you reset all the auto box/driving style parameters every time you disconnect the battery as doing this, wipes all the ecu memories of driver adapted parameters.

Posted on Oct 03, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Engine Check light

Take it to autozone or another place like it and have them read the codes and tell us what they are.

Jun 19, 2013 | 2011 Jeep Wrangler Sport

1 Answer

I have a kia optima 2004 that has a kill switch need to know where it is its draining my battery untill i reset it but cant find it

If you put the following into Google it shows a number of items can be reset.

"2004 kia optima reset"

One site says the Optima doesn't have a fuel pump reset, but offers this on another site

It may be under hood above brake booster, has red button to reset, the 2004 kia spectra,s are located there so i can only assume that the optima would be there to.

There is also information on resetting the computer. This will clear the engine malfunction light. There is a section in my Tips if you click on my name on resetting the vehicle ant-theft system, which is the same thing as it is controlled by the ECM.

2004 kia optima computer reset Google Search

Having said all that, drain or correctly named 'parasitic draw', is from lights being left on in the hood or trunk, or some other electrical device shorting to earth. They are difficult to find and you need a good auto-electrician.

Jan 29, 2018 | 2004 Kia Optima

1 Answer

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..

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.

Feb 10, 2012 | 2004 Kia Optima

1 Answer

My check engine light came on and it's been diagnosed as the fuel cap. I got a new cap now and I need to reset my car so the light can go off.How do I reset my car to do so. I am trying to pass emissions...

On the 2001 Optima you can reset the light by disconnecting the battery for about 15 minutes. If the cap was installed at a shop they should have turned off the light so if it came back on you may have another problem. Do you know hte fault code that was stored?

Oct 25, 2010 | 2001 Kia Optima

1 Answer

I have 2005 kia optima the check engine light is on i had a meter put o it and it comes bck as no code found ,it still wont pass inspection i was told to drive for 100 miles and bring it back for...

If the check engine light is on something is wrong, if the problem was fixed then driving will clear the light, when the codes where checked they should of cleared the light,have the light turned off then drive for a few days then if the light doesnt return then take the test, if the light is off then drive for a few days and retest, this is correct if the light was turned off it takes a few days of driving so that the computer can retest the sysem and make sure eveything is working . hope this helps.

Sep 01, 2010 | Kia Optima Cars & Trucks

1 Answer

Check engine light on p1154 diagnostic 2002 kia optima 2300 mi

Kia:Heated Oxygen Sensor Bank 2 Sensor 1 Transition
I just had this happen on mine. I will reset code and wait.
If it comes on and it was not a fluke I will replace the O2
sensor on Bank 2 which I think is the rearward bank on our
2.x 6 cylinder Optima 2002 SEV6.

Aug 21, 2010 | 2002 Kia Optima

1 Answer

I have a 2002 Kia Optima L4-2.4L and I replaced the crankshaft position sensor but still have the same failure code. What could be the cause

if you haven't had the light turned out with a scanner, that needs to be done. the computers don't reset on OBDII just by replacing the part.

Jul 18, 2010 | 2002 Kia Optima

2 Answers

Engine stopped while driving chk eng light on, engine turns but won't start. Computer shows crank position sensor failure w/3 occurances & several emission sensor codes.

A crank-no start condition can definitely be caused by a faulty crank sensor; if after testing the crank sensor and finding it defective you will need to clear the codes and drive for at least a couple of drive cycles to see if the emission codes are legitimate or were simply induced by the failure of the crank sensor.

Jun 13, 2010 | 2004 Kia Optima

2 Answers

Need wiring diagram for 2001 kia sportage , need it for fuel pump

2002 kia optima has no fire to the spark plugs
or spark plug connector

Jan 20, 2009 | Kia Sportage LX Cars & Trucks

3 Answers

Engine Check Light - 2006 KIA Optima


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


Jun 13, 2008 | 2006 Kia Amanti

Not finding what you are looking for?
2002 Kia Optima Logo

701 people viewed this question

Ask a Question

Usually answered in minutes!

Top Kia Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers


Level 3 Expert

77932 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Kia Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides