Question about 2009 Ford Mustang

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FUEL CAP LOOSE LIGHT

LOOSE CAP LIGHT CAME ON BUT CAP WASNT LOOSE

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  • Ford Master
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The fuel system is is a closed-loop system for emissions purposes. There will normally be a slight amount of pressure in the system when in use. If the ECM does not detect that pressure, the most likely suspect is the fuel cap. Check the rubber o-ring seal on the gas cap. If there are many cracks, or a section that has broken out of it, this can cause the error. An OEM approved replacement cap will fix this. Otherwise, you will need to inspect the fuels system lines, as well as the vent lines from the tank for cracks or leaks.

Posted on Jan 01, 2014

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Posted on Jan 02, 2017

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1 Answer

Serive enige soon light


That light just means the emission levels are too high,doesn't mean there is a big problem,a bad plug wire or even a loose fuel cap will turn on the light,

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Check Engine Light appeared; diagnostics resulted in PO455 code


If you Googled the code, you would find you
have an Evap System Gross Leak

If the gas cap was just loose the light will go out

The evap monitor only runs every few days,so
you may have to wait & see

I think you need to smoke the system & find the
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Check engine light came on and code said to replace gas cap, did that and two weeks later check engine came on same code, then one day fuel light came on and gauge went to fueull then empty 2 times , now...


You wouldn't think a gas cap would be that important, but it is. When it's loose or cracked, fuel vapors leak out and can throw the whole fuel system off. This causes a reduction in gas mileage and increases emissions.
What causes it: If you get an error pointing to the gas cap it means fuel vapors are leaking out of your cap. This means the cap is either cracked or just wasn't tightened well enough.
What you should do: If your car isn't feeling jerky or strange when the check engine light comes on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.

Aug 11, 2017 | 2004 Chrysler Pacifica

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There is condensation around the exhaust pipe is this a problem plus the gas cap light comes on


Condensation on exhaust pipe is normal.
Gas cap light:..This may be caused by loose or leaking hoses, loose or broken fuel cap, a leak at the top of the fuel filler pipe neck, ect......

Aug 22, 2011 | 2001 Ford Mustang

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What does the code p0457 for a 2005 ford sport trac mean?


check for a loose fuel cap or a rust hole at the top of the filler neck. causing a loss of pressure/vacuum.

P0457 - EVAP Control System Leak Detected (Fuel Filler Cap Loose/Off) A fuel tank pressure change greater than a minus (-) 7 inches of H 2 0 in 30 seconds has occurred after refueling; or there is excessive purge (fuel vapor) flow greater than 0.06 pounds per minute.
  • Fuel filler cap not installed on refueling (storing continuous memory DTC) and "check Fuel Cap" light may also be illuminated.
  • Fuel filler cap missing, loose or cross-threaded.
Check for missing fuel filler cap or integrity of the cap. If OK, clear continuous memory DTCs and re-initiate EVAP Emission Running Loss Monitor Drive Cycle.

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1 Answer

Fuel gauge on 1999 Sonoma doesn't work but "low fuel" light stays on. What should I do?


This is a float issue, If a recent fuel pump was done the float was knocked loose, If it wasnt a repair? The float is bad

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A light lite up on my dash board that looked like a car part. I got out and turned the gas cap back on and it went out. Before that when I started it was missing a little until it warmed up.


Sounds like the light on your dash was a Fuel/emmisions light. If your gas cap wasnt on properly you could have encountered a small case of vapor lock.

Vapor lock can cause your car to sputter at idle, have poor accelleration, be hard to start and at times when vapor lock is severe even cause your car to not start at all!

Jan 30, 2010 | 2006 Chrysler PT Cruiser

1 Answer

FUEL CAP LIGHT ON


Hi:
The check fuel cap light is tripped when your cap has been loose or off, and the engine is running. Often you need to have the light reset by a code scanner. If you have checked the cap and it is secure, if you reset the code and it comes back, you possibly need a new gas cap.

Nov 25, 2009 | 2006 Honda Accord

1 Answer

Im having a similar problem with the engine light being on-


Most vehicles will sense that the tank is not sealed, will turn on a light. Depending on the make of car, may have to drive several hours, several starts, etc. before it resets itself after you correct the gas cap problem.

Sep 08, 2009 | 2008 Dodge Avenger

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