Question about 2003 Ford Expedition

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My trouble code is p0456 what is my problem my check egine lite is on

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There is a small air leak in the vehicles Evap system. This includes the fuel cap, fuel filler neck, fuel tank, all evap lines and solenoids that could be the problem. Most common are the filler neck where the gas cap goes...sometime you can see small cracks.

Posted on Nov 27, 2012

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Posted on Jan 02, 2017

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2001 Isuzu Rodeo trouble code P1275.


P1275 has to do with the Fuel/Air metering, check and/or clean your Mass Air Flow Sensor, also check for leaks around it.
P0456 signals a small leak in the Evaporative System, this could be your gas cap having a leak or a small tear in the hoses leading to the Evaporative canister.

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Check egine light is on. turn signal, head lites, seepomiter, heater-air blower does not work.


Get the PCM scanned for a fault code or do the key dan e: ignition switch off/run three times and leave in run at third time. The odo;meter will show Done when all ok, or a fault code.(s).

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ENGINE CODE P0456


Hi there:
DTC P0456 trouble code which refers to Evaporative Emissions System, check HERE additional details to test.

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Trouble shooting a 456 code on a 2002 subaru legacy


Evaporative emission control system malfunction
Usually this P0456 code is caused by an incorrect or faulty gas cap. Filling the fuel tank with the engine running could conceivable cause this code as well or if the cap wasn't properly tightened. Any of the following could also be the cause:
  • A small leak in any of the EVAP hoses or fuel tank hoses
  • A small leak in the purge valve or vent valve
  • The EVAP Canister may be leaking

Oct 17, 2012 | Cars & Trucks

1 Answer

Code p0456


P0456 DODGE - EVAP System Small Leak
As you see form the list there is not a single problem that causes this code to set.
Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking

Read more: http://engine-codes.com/p0456_dodge.html#ixzz1xQr2MVRf

Jun 10, 2012 | 2001 Dodge Stratus

1 Answer

I have a 1997 Mercury tracer and the check egine lite is on when i had the code checked it was P1443 what can I do about this


This is the EVAP system control valve. make sure the hoses are all connected and not leaking. If ok, replace the valve.

F7CZ-9C987-AC $200.00 new

It's in the canister purge line from the evap canister to the engine

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I got a 2001 chrysler town&country thats got codes on them reading P0353 and P0456 and i would like to know what they are and where to start by fixing them?


Hi. Error code P0353 tells you that ignition signal coil 3 primay/scondary circuit is malfunctioning. There are thing to be checked to clear this code. I provided you a link for this.
Error Code P0456 is a diagnostic trouble code pertaining to leaks in the vehicles fuel vapor management system. The code is often set by failure to properly seal the gas cap after filling the tank, or from leaving the engine running while filling up at the gas station. The code can also be caused by a damaged fuel vapor line, a bad seal in the evaporative emissions system, a leak at the purge valve or a leak in the vapor canister. After you have determined the cause of failure and corrected it, you can clear the code out.

Nov 09, 2010 | 2001 Chrysler Town & Country

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2006 Dodge Caravan 3.8 V-6: check engine light on


The P0456 code has nothing to do with spark plugs. It's an EVAP (emissions) code. Best bet is to read up on the suggested solutions for that exact code: P0456

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2005 Dodge Grand Caravan codes P0456 and P0303. Engine light on. Changed Gas cap. Need to pass inspection. Please help with diagnosis.


p0456--emission control system leak(verysmall) leak, check all hoses to emission controls, cylinder 3 missfire detected. could be plugs, wires, or coil.this is code p0303,

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5 Answers

Diagnostic code P0456 for 2003 Dodge Ram 1500 5.7


P0456 = EVAP Emissions Control System Leak Very Small

Is the gas cap on tight or is the seal damaged? If it needs replacement, get it from the dealer.

Aug 22, 2008 | 2004 Dodge Ram 1500

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