Question about 2001 Hyundai Elantra

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What is the proper way to tighten the gas cap on the 2001 Hyundai Elantra and will it make the chech engine light go off? It comes on randomly but now has been on a while and emissions test is due.

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Someone has posted that you need to use 3 clicks of the filler cap.
???

Posted on Sep 17, 2010

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1/2 Turn after you hear the clicking.

Posted on Sep 17, 2010

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1 Answer

My 2003 hyundai elantra's check engine light is on.


most of the time a engine light will set with an Evap leak code if the gass cap is not tight or left off. tighten cap, or replace cap if gasket is cracked or worn.

Mar 06, 2012 | Hyundai Motor 2003 Elantra

1 Answer

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 2001 hyundai elantra with a p0440 code.I replaced the PCV valve & hose,cleaned/tightened gas cap,tested manifold vacuum[is good],replaced rear charcoal cannister & pressure sensor...


Sounds like you have done a lot of the right work here. I popped that code on my 2001 Elantra within the first 50k miles. Turns out that in my case the gas cap was the culprit. Keep reading though, maybe this still applies. My cap was still very new, and it's not that I forgot to put it on or to tighten it. The mechanic at the Hyundai dealership said this happened all the time to this car, and that you simply have to get the cap tighter. It has that ratcheting release so as to not over-tighten it, but here's the trick: Tighten as normal, allow a few clicks for good measure. Then, press in firmly against the cap and you'll see that you can get another 1/8 or so turn out of the cap. I popped this code 3 times total, the first time the dealer just reset the light. The second time was when he told me about this, and the last time was accidental on my wife's part. :) You can reset the light by simply removing the battery terminal... 30 minutes seemed to work for me... and then reattach. Of course it goes without saying that this is with the car off. Good luck!

Aug 07, 2011 | 2001 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

Jan 19, 2011 | Hyundai Elantra Cars & Trucks

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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

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


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.

Nov 19, 2008 | 2001 Hyundai Elantra

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