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Chrysler 300 2010 had a loose gas cap code fixed it but engine light still on

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The code is telling it can't pressurized the tank because there an air leak usual from the gas cap.

Try taken the cap off than put it on again, but make sure that the engine off and the key not in the ignition. If that doesn't work try a different gas cap. Make sure that the tank is full it help also get rid of the code.

Posted on Apr 27, 2015

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2008 chrysler sebring touring p0457


I would replace the cap first.
The code means the computer can not vent the fuel tank to the vapor canister because there is a leak somewhere. The most common spot is the gas cap.
If a new cap does not fix the problem, you would need to have someone check all of the hoses and valves for a leak, including the gasket on top of the gas tank.
You have to use a scanner to clear the code and turn the light off when the problem is fixed.

Dec 23, 2012 | Cars & Trucks

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Check Engine Light


have you ever changed the plugs,wires, rotor, distributor cap?it just may need a tune up. check under the cap for any signs of electrical corrosion or cracks or moisture, when was the last time the engine oil was changed? sludge in a engine will also trigger codes which will give you a check engine light even something as simple as a loose gas cap or a worn gasket on the gas cap will trigger a code

Jan 02, 2012 | Chrysler Sebring Cars & Trucks

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My check engine light came on. The dealership said "filler neck leaking causing evaporative leak." The gas cap also says "loose cap will turn on check engine light." Would like to try a new gas cap but...


sad to say sir that how to clear the code is not easy in manual clearing, you need diagnostic tool to clear the dtc, but some dtc will cleared by 20-50 consecutive warm up if no other trouble code detected by the computer

Jun 19, 2010 | 2001 Chrysler Town & Country

2 Answers

Check engine light came on Tuesday afternoon, after I filled the gas tank on Monday afternoon. If the check engine light came on because of the gas cap not being on tight enough, do I just tighten the gas...


Check engine light might have came on because of loose gas tank cap, but it's a good idea to read the code and check if it's not something else, you can take your car to an Auto Zone and they read the code for free and tell you the cause also. But if you want to reset the check engine light, only way is to disconnect the battery terminals and let it set overnight, check engine light will be reset. Hope it helps and let me know if you need more advice. Please don't forget to rate the answer it helps with my ratings, thanks!

Apr 28, 2010 | 2002 Chrysler Town & Country

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Check engine light comes on in a 07 sebring when the gas cap is removed and the engine is started there is no change in the indicator.


this is normal, you should not have engine running when re-fueling, fuel gauge moves very slowly if key is on while fueling, turn key off and then on and should read proper level.

Mar 01, 2010 | Chrysler Sebring Cars & Trucks

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Check engine light is on and where the milage goes it says gas cap


Your gas cap is loose and setting a code, may need to replace cap. When you tighten gas cap turn cap slowly it may seal better. You should feel it turn before it starts to click..

Feb 23, 2010 | 2006 Chrysler Pacifica

1 Answer

Check engine light on 2001 chrysler 300m. The code says it has to do with either my gas cap not being tight or some sort of fuel fumes. I'm sorry I don't know the codes.


Make sure that the gas cap is the correct one. If the gas cap was replaced with a different style or a locking cap this will set off the check engine light. It can tell there is a problem because it measures the built-up pressure in the gas tank. So the pressure is not building in the tank due to a loose or incorrect fitting gas cap or a loose,cracked fuel line, or bad check valve in the charcoal canister for the fuel tank vapor release line.

Oct 03, 2009 | 2001 Chrysler 300M

1 Answer

2005 pt cruiser check engine light came on put a diagnostic code tester on and it came up code po457 and po456 what would this mean?


P0457 is a loose gas cap, P0456 is a small evap system leak. The seal on your gas cap is probably worn. Replace the cap, clear the codes with either a diagnostic tester or by disconnecting the battery for a few minutes and reconnecting it. It will take a few days for the code to come back if it isn't fixed, but that usually does the trick. I hope this helps.

Apr 27, 2009 | 2005 Chrysler PT Cruiser

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