Question about 2000 Nissan Frontier

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My check engine keeps coming on and then will go off for a while. I have checked the gas cap several times and it is tight. What could be causing this i use 87 octane

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If the light was flashing when it came on, then it means your engine is misfiring.
A solid light can mean anything.

This light comes on when the computer detects a fault of some sort in its diagnostic tests. If it keeps detecting this issue, the light will remain off. If the light turns off, then it has detected that the issue may no longer be present.

In order to find out what the exact reason was for your light, You need to have your car computer scanned to retrieve the code that the computer would have stored when the light triggered. Most garages will do this free of charge. The code will tell you what may have caused the light to initially go on

Posted on Sep 25, 2009

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1 Answer

Engine light,


99% of the time, the gas cap wasn't tightened properly, or is leaking. Make sure you twist it tight and it clicks a few times. If the "Check Engine" light stays on after a few days, buy a new gas cap. Again it may take a few days to clear.

Jun 14, 2012 | 2002 Dodge Grand Caravan

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Service engine light stays on


Hi Patricia:
If the "Check Engine" light came on soon after a fill-up at a gas station, check if your gas cap is closed properly. If the gas cap wasn't on tight, this could be the problem. Secure the gas cap properly and if there is no other problems, the "Check Engine" light should clear itself out in a few days of driving. If the gas cap was tight, there is some other problem. Have your car computer scanned to see what is wrong. It could be some minor problem, but it also could be something more serious that can cause more damage to your vehicle if not repaired in time. Some garages or parts stores often offer to scan your computer for free. Others will charge you a diagnostic fee. If your car is fairly new, I'd advise to visit your dealer for this, because it's possible that the problem is still covered by the original warranty and can be repaired for free or a minimum charge. Check your owner's manual for more details.




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Jan 26, 2012 | 2002 Cadillac Seville

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I GET CHECK GAS CAP LIGHT I REPLACED CAP NO CHANGE


Make sure it's tight - IE: turn until it clicks 3 times (According to GM) that or the vent tube has a vac leak

Apr 04, 2011 | 2005 Pontiac Montana SV6

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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

P1456


code P1456 set when there's small leak in the fuel tank system.
Most known reason for P1456:
-Didn't tight fuel cap on until it click for more that 3 time after fueling up and drove the car too long with cap loose.
-or a bad gas cap.
I'll try tighting the gas cap.
clear check engine.
if code come back, replace gas cap and clear check engine light again.

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You gas cap is not on tight enough to seal causing the Check Engine Light to come on. When you tighten your gas cap you need to tighten it until it clicks at least 5 times, if it is tight than the seal on the gas cap may be bad. Replace with a OEM GM gas cap or a quality replacement that meets OEM specs.

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Chevrolet 2005 Tahoe Gas cap issues


Have the cap pressure tested. Replace if need be.

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Check engine light comes on


HAVE IT SCAN.BUT MOST OF THE TIME WHEN CHECK ENGINE LIGHT COMES ON WHILE DRIVING AND IT DONT EFFECT ENGINE.IT COULD BE GAS CAP NOT TIGHT.A CYLINDER MISFIRE OR EVAPORATIVE LEAK.TAKE IT TO AUTOZONE HAVE IT SCAN THEY WILL DO IT FREE.

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3 Answers

Check engine light/gas cap will not stay tight.


Yes, the gas cap will cause the Check Engine Light to come on. Will set code P0441 if I remember correctly. It should be okay to drive it. If you would like to confirm the code, take the truck to an auto parts store like Autozone and have them hook up their scan tool and read the code. If its P0441 it will probably be something like EVAP or Evaporative system leak.

Its an easy enough fix while your there too, just pick up a new gas cap or you could pick up an OEM one from the dealership.

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