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I have a 2003 Lincoln Navigator and i noticed that when i am in a drive thru i smell gas.when i was getting a tire changed the tire guy said that he smelt gas coming from under the truck but we didnt see any drips.my fuel mileage is gone down and the check engine light has come on.its giving code #P0456i already bought a new gas cap from Lincoln already so i dont think thats the problem.can u narrow down what it could be?

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Check your gas cap. It may not be sealing well.

Posted on Jul 14, 2017

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emissionwiz
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SOURCE: Check Engine light on 1998 BMW Z3 roadster

yes the light is because of the gas cap being gone (sets code in evaporative emissions system), replace the gas cap, disconnect the battery for five minutes and that will turn of/reset the light, make sure u have the radio code before u do this, if u don't u will have no radio after the battery is disconnected..

Posted on May 08, 2009

pippall
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SOURCE: 2006 start up problems

sounds like fuel air tank vent blocked.

Posted on Jul 10, 2009

abauto
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SOURCE: 2004 Dodge Intrepid Check Engine Light & Bad Fuel Mileage

If it has never had plugs changed, i would suggest it. It can make a big difference.

Labor time is .8 hrs + 6 plugs = $80 - $150.

Take your car to a parts place and they will usually check and clear your light for free.

Firestone likes to up-sell everything, $650 is way too much for a basic tune up.

Posted on Sep 19, 2009

  • 1 Answer

SOURCE: 2003 Lincoln Navigator stumbles/bucking under mild acceleration

I have a 2003 Nav with the exact same problem. I've found it diminishes when taken out of overdrive. Also it's intermittent but more towards bucking. Sorry to post this under solutions.

Posted on Nov 06, 2009

philschneide
  • 448 Answers

SOURCE: 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.

Posted on Nov 17, 2009

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