Question about 2009 Hyundai Sonata

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Can the 2009 hyundai gas cap malfunction if turned to far past the first couple of clicks causing the engine check light to come on. The 2011 caps can only be turned until the first click and no further. Is this the correction of a problem that Hyundai will not admit to?

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The clicks you hear are only the ratchet working so that you dont overtighten the gas cap,it clicks for no other reason.if your engine management light is on check the diagnostic computer for a fault....

Posted on Aug 20, 2010

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Posted on Jan 02, 2017

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Can a lose gas cap cause the engine light to come on on a 2009 280 volvo


Answer to this is YES. Replace cap with about 3 clicks this is enough. If your check engine light is on the cars computer wil erase after a few miles. GOOD LUCK FRIEND.

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My gas cap was not tight and the check engine light came on what is wrong


The loose gas cap can mess with your vacuum system but a check engine light means check your computers error messages. Have a mechanic do so before we speculate too far.

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If the code would have been due to the cap problem then the code will go away. Try resetting the code. Also try diagnosing again after disconnecting the battery and then reconnecting it after a few minutes.

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2005 Hyundai Tuscon with the check engine light is on. The car is running fine. I had just put gas in it. The gas cap is securely fastened. I took it in for an oil change. The light still plagues me.


When a 'check engine light' (MIL=Malfunction Indicator Lamp) is turned on, there is a DTC (Diagnostic Trouble Code) set/stored in the ECM/PCM (Engine Control Module/Powertrain Control Module). This code identifies which engine management system component/function experienced a malfunction. Once you pull/read this code, you may begin diagnosis.

Sep 03, 2011 | 2005 Hyundai Tucson

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My check engine light keep coming on the code was gas cap I bought one and it still keeps coming on


the code doesnt refer to gas cap it is just the most common problem associated with PO440 what it means is the tank isnt building pressure can be caused by leak loose vent hosae damaged canister look for loose connections at tank will not be fuel lines only vent

hope this helps give you ideals plz leave a comment and reply if you have more questions

Jan 17, 2011 | 2006 Hyundai Sonata

1 Answer

Every time I fill up with gas my check engine light comes on and the car sputters and runs like ****. The check engine light comes on for a couple minutes then goes off, after a while the car starts...


I don't know for sure, but I suspect the gas cap seal is leaking. Check the gas cap seal and mating surface for dirt. Buying a new cap might also be an option if you want to try that.

May 14, 2010 | 2000 Hyundai Accent

2 Answers

Check engine light came on. Code P1456.


Did you change the gas cap with a Honda gas cap? Tighten it at least three clicks?
Also, Honda recommends that you never top off the tank when getting gas (only go to the click-off of the pump; otherwise you can get back flow into the system that will cause the code).
Tightening or replacing the cap will not immediately cause the light to go off; it can take up to three days of driving for the light to reset.
To check if your readiness codes (emission system) are set, turn the ignition to ON (II), without starting the engine. The Malfunction Indicator Lamp will come on for 20 seconds. If it then goes off, the readiness codes are set. If it blinks 5 times, the readiness codes are not set.
You can, of course, try resetting your engine light to see if it will come back on (which it probably will). I believe the procedure is:
Turn off the engine.
Press and hold the Select/Reset knob (odometer) in the instrument panel, then turn the ignition switch to ON (II).
Hold the knob for approximately ten seconds until the indicator resets.

Hope this helps you.

Nov 17, 2009 | 2004 Honda Pilot

1 Answer

Check Engine light goes on consistently


I would take the car to an autoparts store and have them scan the computer for codes stored. Most parts stores will do the scan for free. The check engine light is to alert you that the computer has noted a fault in one of the car's systems. A loose or faulty gas cap can cause an intermittent check engine light, but it could also be something in the evaporative emissions system that is causing it. Getting the codes should help end speculation so that the problem may be properly addressed. Sorry for your trouble and I hope this helped. Best wishes.

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3 Answers

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check the oil and coolant levels. if they are up, and there are no funny noises, you should be fine.

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2009 Hyundai Tucson, check engine light came on


Did you forget to tighten the gas cap correctly? This has caused many many lights to come on. If not, then drive it till you can get it to the dealer.

Jun 05, 2009 | 2009 Hyundai Tucson

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