Question about 2003 Dodge Durango

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Code P0456,P0455, &P0442

I have a 2003 dodge durango. My check engine light came on & the following codes came up: P0442, P0455, & P0456. My truck now takes too long to start and shuts off immediately or runs for about 5 seconds and shuts off. Can anyone help please? Thank you.

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  • Anonymous Mar 27, 2014

    Also, when I go to put gas in it will kick off when full, but then gas runs out. Also, keeps shutting down when trying to pump and the place you put the nozzle in, seems wiggly.

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Hello po442 ,po455,po456 is leak detected possible, check the gas cap , basicaly you have a leak that is larger than 0.020' and smaller than 0.040' in the gas evaporative system use your nose to find this one thanks

Posted on Feb 14, 2009

  • John Peters , Aug 24, 2013

    ecu pin outs for ford fiesta cvh 1, 4 the vehicle is flooding injector pulse is too high

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ok code po455 is a code for the evaporative control monitor,for this i would suggest you check the dealer because its a very large leak in the evap system,and for the po456 which is a very small leak in the evap system

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1 Answer

2003 DODGE DURANGO CODE P0456


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
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Lights keep on coming


They mean you have an Emission Control leak. it could be something as simple as a missing gas cap or a leak at the muffler, Catalytic Converter or pipes.

Google Emissions Control System for your vehichle to get more or less an idea where to look at a diagram of the Emissions Control System. All the codes mean the Computer has detected a leak.

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P0455:
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P0456: EVAP leak monitor small (.020). Leak detected.

I suggest check the lines and flow it down to the ldp (leak detection pump) that is just behind the steering gear under the van It has a wire connector and 2 large EVAP hoses. look for any split or crack then follow the lines back to the tank. Even a small crack is a leak.

Hope helped with this. Remember rated this help. Good luck.


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