Question about 2001 Hyundai Elantra

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Check Engine Light is On 2006 Hyundai Elantra 13,000 miles

My daughter did not close the gas cap on her car. The Check Engine Light immediately came on. Is there any easy fix to have the light go off now that the gas cap is closed. Thanks.

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An easy fix, if the check engine light is on find an Auto Advance, they can clear the code for you. Any auto parts store may be able to as well, Auto Zone is another one that may be able to help.

Posted on Nov 22, 2008

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Check engine light went on Monday evening when I started my 2004 Hyundai Elantra. I shut it off and tightened the gas cap. That didn't work. It is still on as of Tuesday afternoon.


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) 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.

Aug 23, 2011 | 2004 Hyundai Elantra

1 Answer

I have a liltle light in the panel of my car (Hyundai Elantra 2001) that says check engine and the scan problem is the famous ... P0440 EVAP System please help me i really want to eliminate the error !!!...


tightening your gas cap can sometimes fix this problem. Think if the light came on after buying gas.
If not it's usually the rubber seal around the gas cap. Just measure and replace with a similar rubber seal available at any hardware/auto parts store.

May 04, 2011 | 2001 Hyundai Elantra

1 Answer

Hello, I asked the following question a few weeks ago and received a response that this sounded correct. We replaced the Gas Cap and the check engine light is still on after driving about 60 miles. What...


some times light wont reset self got to have it shut off autozone want shut it off but most advance auto will or disconect pos. battery cable for 30 min. it will normaly reset light

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3 Answers

2001 Hyundai Elantra


The turn signal switch is grounding out somewhere which is probably at the switch and may need to be replaced. That is laziness on the dealers part for not checking the obvious. Tighten the gas cap completely and drive the car 40 to 50 miles and if the system is sealed, the light should go away. Please rate me on this answer.

Jun 08, 2010 | 2001 Hyundai Elantra

1 Answer

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2 Answers

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Take the car to Autozone or purchase a scanner and scan it for codes. Then do the repair and use the scanner or return to Autozone and have them turn off the light.

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1 Answer

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Check your engine oil and break oil weather it is in below low level or full, if it has in low level get an engine oil for your car module and pour it. otherwise go to authorized Hyundai service centre and check for it.

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