My 05 1500 Hemi is giving me a check engine light. After reading the codes I am getting... P0171 System too lean Bank 1, P0174 System too lean Bank 2, P0456 Evap Emission Control system leak very small, P0457 Evap Emission control system leak very small. I have changed the gas cap several time, cause I know that dodge is good for that one. LOL!! But I am at a loss. The only other thing that it is doing is that it has will reeve to about 1500rpm at a cold start. Any ideas?

 

Luckily ALL 4 codes are most likely being caused by a vacuum leak.

Besides the gas cap issue being common, Chrysler uses pretty cheazy hose clamps. Trace the evap system and pay close attention to the clamps and the hose ends for cracks and broken ends.

Here's you a map:

https://dodgeforum.com/forum/3rd-gen...m-diagram.html

Also look around the throttle body and here's another common place:

 

I've got the "gascap" coming up on my odometer, check engine light: code P0457. I have replaced my gas cap once already which made the "gascap" dissapear. It has returned & I've tightened the gas cap. I don't see any obvious cracked or worn hoses.

Any other ideas?