Question about 2001 Dodge Ram 1500 Truck 2WD

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Emissions problem ODB ll code po455 comes up. engine light on,and get on the gas hard and it acts like its starving for fuel skips and pops. sometimes it does not shift right away gets to 4to5000rpm before shifting.

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  • kcloutier24 Jan 22, 2009

    this didnt help. no lines were split,disconnect or cracked. anything else........

  • kcloutier24 Jan 26, 2009

    did not find any thing wrong with any hoses going to the gas tank,leak detection pump and the charcoal canister. i replaced the gas cap and pulled the o2 wire front and rear. nothing changed totally lost please help!!!!!!!

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P0455 is the code for a large evap emissions leak. check all the hoses going to the charcoal canister....the gas tank and the leak detection pump...u will probably find one split

Posted on Dec 16, 2008

  • Russell Bailey Jan 26, 2009

    the easiest way to find the problem at this point may be to have a smoke test run on it...it may show the problem quickly. this is one of those problems that cant always be fixed quickly

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P0455 - Evaporative Emission Control System Leak Detected (no purge flow or large leak)

This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Symptoms: You likely won't notice any drivability problems.

Causes: A code p0455 most likely means one or more of the following has happened:
A loose or improperly affixed gas cap
A non-conforming gas cap (i.e. not factory/original brand)
Other leak or damaged piece in EVAP system

Possible Solutions: With a p0455, the most common repair is to:
Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
Otherwise, replace the gas cap, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary


Test, check it and keep us updated.

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What does diagnostic code PO455


A code p0455 most likely means one or more of the following has happened:
  • A loose or improperly affixed gas cap
  • A non-conforming gas cap (i.e. not factory/original brand)
  • Other leak or damaged piece in EVAP system

With a p0455, the most common repair is to:
  • Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, and/or
  • Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary.

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With a p0455, the most common repair is to:
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  • Otherwise, replace the gas cap, and/or
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Let me know if you have anymore questions!

Sincerely,

JC

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