PO455 code

[Squatch52]

I got a 2010 Dodge Ram 1500 5.7 hemi just had the fuel pump replaced now it throws a PO455 code would you start with the gas cap or the EVAP canister and also sometimes when I am coming to a stop it will go dead what would cause that to happen other than that the truck is flawless

 

[mtofell]

Not sure about it going dead but that code detects a leak in the system. Are you sure it's not just from when the system was "opened up" to replace the pump? Have you reset the code and does it come back?

 

[OCDTech]

P0455 is a LARGE evap leak. Perhaps some hose was left off when pump was replaced or possibly something damaged. I wouldn't think a gas cap, thats usually a small leak, or the computer actually checks for leak every fill up to warn you of leaving the gas cap off while filling up. Smoke test if possible, or look around where you can see if any hoses were left loose arount the evap canister or gas tank.

 

[Squatch52]

I just reset the code I'll wait and see if it comes back on thanks for the info OCDTECH and mtofell

 

[OCDTech]

The other possibility is the purge valve stuck open, may be easy to check, this could cause truck to die when letting off the gas because essentially its a huge vacuum leak.

 

[Dodge 1500 4X4]

Possible fuel pump relay, that build into the TIPM, there is a relay bypass kit you can get diagnose to problem at
verticalvisions.com, and there is a company that fixes them.

 

[scott lass 18]

I got a 2010 Dodge Ram 1500 5.7 hemi just had the fuel pump replaced now it throws a PO455 code would you start with the gas cap or the EVAP canister and also sometimes when I am coming to a stop it will go dead what would cause that to happen other than that the truck is flawless

hay mine too ! come to stop drops 450 rpms stops running 2 seconds ? I did replace evap switch went bad a while ago no codes now u find out what it is ? u think tipm fuel relay bad its in the circuit broad going bad on 2011 and up ? let me know ok ! thanks scott

 

[scott lass 18]

vapor leak detection pump filter could be causing it too 13.00 part ? on top of tank ok

 

[enolS]

Did you get under and check? I replaced my fuel senor by dropping the tank was a quick job maybe two hours. A day later I started to receive that error so I cleared it, even disconnected the battery only for it to come back on the follow day. So I went underneath and found two connections I forgot to connect..no wonder the job was so fast!

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