hi i have a 03' ram 1500 i check the dash today and got these 2 codes
p0555
p0444

the p0555 is Brake Booster Pressure Sensor Circuit im not sure what that is or where it is, but i would assume its near the master cylinder. is this just a sensor or does the whole unit need to be replaced?

the p0444 is an evap code but i cant narrow it down to what it is, ive checked several places online and here and i get slow evap leak, med evap leak, Evaporative Emission Control System Purge Control
Valve Circuit Open.

 

4.7L or 5.7L? Just curious not that it should matter all that much...

Brake code.. It's possible the sensor on your master cylinder is bad.
Evap code...You could have a leak on a rubber hose that is located topside towards the front of your gastank.(bewteen bed and box pretty much) Lots of guys have replaced this 90* bent shaped hose with a crack and it resolved their evap issue.

 

Sounds like there may be an open circuit on the evap solonoid coil, I believe it is located in the engine compartment on the drivers side off to the side of the condenser coil near the frame rail

 

ill take a look when i can bad weather headed my way. also its the 3.7, i have a buyer now and im working on a durango now with some codes

 

made a mistake with the codes rechecked em and its p0442 and p0455 both seem to be med and large evap leak and i checked some lined near the carbon canister and found a hose that has some large cracks im gona try to get a new hose soon

 

Before you go crazy, check the most obvious. The Diagnostic Trouble Error Code listing for both codes suggests that you first remove the gas cap and reinstall after clearing the code. If the code comes back, have the gas cap tested and/or replaced.


Great link for description and diagnosting codes.

http://www.permoveo.ltd.uk/tabid/122...m/Default.aspx


Good luck