Question about 2004 Lincoln LS

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Fuel cap light keeps coming on - 2004 Lincoln LS

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Use the OBD2 Codes you get- to diagnose the Evap System

While the gas cap could be bad- so could six or more other items
in that system, that are causing a leak

Posted on Jan 17, 2013

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Posted on Jan 02, 2017

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My emergency lights keeps coming on their own and the fuel caps opens itself. What could be the problem?

If the fuel cap opens, some autos have a sensor that will see there's no pressure on the fuel system and you'll get a service engine or other light. You probably need to replace the gas cap.

Nov 03, 2015 | Cars & Trucks

1 Answer

My check engin light keeps coming on i had it check they it could be the fuel cap took cap off put back light gose off i was that the line may have a leak

Fuel cap is part of the emission system. If is not put back on correctly your light will come on. Removing and installing correctly will cause the light to go off. Make sure cap is secure each time you fuel up. See if that ends the problem. If not try a new cap.

Apr 03, 2015 | Dodge Durango Cars & Trucks

1 Answer

My check engine and check fuel cap light keep coming on after i changed the gas cap twice and reset the light it came back on what could this be. I drive a 06 lincoln navigator

You need to diagnose any codes you get
& smoke test the evap system, to find a

Seldom does throwing on parts with a name similar
to a code work

Codes have nothing to do with installing parts

Clearing codes, clears all data needed to diagnose
the failed system & the evap system only runs every few
days,so you done as far as codes helping

Mar 22, 2014 | 2006 Lincoln Navigator

1 Answer

2004 Pontiac Grand Prix, check gas cap

Could possible be the Fuel Tank Pressure Sensor. It is located on top of the fuel pump. The fuel pump access is located in the trunk, under the carpet, behind the back seat. The AutoZone part number is SU 1390.

Apr 02, 2010 | 2004 Pontiac Grand Prix

1 Answer

2005 Ford Taurus ABS light and fuel cap light remain lit. Also digital meter than reads gas and mileage keeps turning off. Just fixed brakes so theyre fine but light stays on and cap is on fine.

you will need to replace the fuel cap. The light doesnt tell you the cap is on or off. What itis doing is measuring the pressure in your tank. If it is not in a certain range then the light comes on.

Jun 25, 2009 | 1995 Ford Taurus

2 Answers

Check light went on

The check light indicates an event has occurred that requires your attention. It could be anything from a bad sensor to a plug misfiring.
You need to get an error code readout. You can get a readout from many auto supply parts stores. The loaner meter is free. You can call around. Try Advance Auto, AutoZone e.g.

Apr 21, 2009 | 1998 Honda Civic

1 Answer

Engine Light/tighten fuel cap

Good Day,

Sounds like your fuel cap needs to be replaced, there is a rubber seal in there to which keeps fuel pressure up, when this seal goes bad you get a drop in pressure and your engine light will come on. Replace the cap with a new one. As far as your lighter ports that is probably due to a blown fuse and unrelated to the fuel cap issue.

Hope this helps

Sep 10, 2008 | 2005 Chevrolet Silverado

1 Answer

Engine light

Your evap system is detecting a small leak. the seal of your gas cap is at fault. Make sure you hear the cliicking of the cap when re-installed. If it still makes your light come on, replace the fuel cap.

Jun 23, 2008 | 2006 Chrysler Town & Country

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