P0440 and P0456 EVAP Codes

Asked by evrp99 May 24, 2011 at 04:21 PM about the 2003 Dodge RAM 1500 ST Quad Cab RWD

Question type: Maintenance & Repair

4.7 liter with 106,300 miles.  In addition to the codes and check engine light on, the RPM varies 200 - 600 RPM at all vehicle speeds.  At idle it varies from about 500 - 1100 RPM and at 70 MPH it varies from 1800 - 2400 RPM.  Any help or suggestions on where to start? And a place to get parts for the EVAP would be appreciated.

1 Answer
135

Robkim answered 13 years ago

My truck throws the same codes. Means you have aminorleak in your system. Loosing slight pressure in your manifold or engine ( i believe ). My 1500 will not go into drive or nuetral gear so i can start it. its been happpening more and more , getting harder and longer for it to " go" into gear...uuuugggghhhhhhh.

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