Question about 2004 Dodge Ram 1500

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Dodge ram 4.7 p0440

I have a 0440 code on my 4.7 dodge ram ( 03). sometimes it will go off for a day or two , then come back on .

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Symptoms You likely won't notice any drivability problems.
Causes A code P0440 could mean one or more of the following has happened:

  • The gas cap is not installed or working properly
  • The purge solenoid has failed
  • The canister is plugged and not working properly
Possible Solutions With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
  • Inspect the EVAP system for cuts/holes in tubes/hoses
  • Inspect for damaged or disconnected hoses around the Evap purge solenoid
  • Check and/or replace the sensor
  • Check and/or replace the purge valve
  • Have a professional use a smoke machine to detect leaks

Posted on Jun 02, 2009

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Posted on Jan 02, 2017

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