New on this site but not to Mopars. An advance thank you to anyone who can lend a hand.

The truck is an 06 RC Ram SRT

I do not drive the truck often. During a ride after it sitting for a few weeks I get a CEL. I get home, scan it and I get P0455 and P0442. I give it a visual inspection and find that the hose coming off of the canister and up to a T fitting (its about a 1 foot piece) has been chewed by a mouse. I cut out the chewed part which was about 1-2 inches on the top of the hose and replace with a 5/8 piece of tubing.

I reset all and I still have pendings. I have visually inspected nearly all other hoses and see nothing. I have not smoked it but could it be another component of the system throwing that error? I am banging my head over this thing! For once I find a smoking gun (the chewed evap line) and replacing it does not clear the stupid problem! Maybe some of the shavings dropped in and are causing a problem??? I do not know what else throws those 2 codes. I would think on an evap leak large I would be able to see it. I hate to pay for someone to hook up a smoke machine to find that its not a leak (actually I hate to pay someone for hooking up a smoke machine but I cant find anyone who I can borrow one from). Any help is appreciated as I am nearing wits end on this thing!

 

Good question. I too have had the P0442 code for 10 years and a few days ago I got the P0455. I believe both codes have to do with a small evap leak or something. Hope someone else fixed them and can post a reply.

 

It's a bit of a long shot but have you checked your gas cap? If it's kinda cracked or rough looking that could throw that code

 

If you've followed the hoses (there should be about 3 i think) from the solenoid to their destinations and didn't find anything and the gas cap looks good, then I would say one of 2 things. 1, the solenoid itself has some internal problems, or there's a leak you just cant see. So, you probably will have to take it to get smoke checked for leaks, and if that doesn't work it's possible to mechanically check the solenoid to see if it is not working. That requires a vacuum though so unless you can do that you'd need someone else to do that as well.

 

Thanks for the replies. Well the gas cap looks OK but I can't be 100% sure. I flipped the o ring just in case but still no good. I figure it must be related to that evap tube chewed but who knows. I know its really frustrating that's for sure. Paying someone to fill the system with smoke them looking for a leak will fry my a$$. I garage full of tools and I need to pay for that...ugh.

Maybe the mouse jammed some nuts or something in the tube. I am not ready to give in yet.

 

Here is information from the data base I use. Note that it does not appear to affect driveability. I have the same issue with a Lincoln. I replaced the gas cap and it was good for a while. Now it appearson an irregular basis, more often when cold. This means to me a weak seal some where. I keep looking, but it does not upset me any more. I only have to worry when it is inspection time.



Generic OBD Error Code Details for P0455

Evaporative Emission System Leak Detected (large leak)
What does this mean?
OBD Code P0455refers to
This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
Symptoms
Possible sumptoms of OBD code P0455
You likely won't notice any drivability problems.
Causes
Possible causes of OBD code P0455
A code p0455 most likely means one or more of the following has happened: A loose or improperly affixed gas cap A non-conforming gas cap (i.e. not factory/original brand) Other leak or damaged piece in EVAP system
Possible Solutions
With a p0455, the most common repair is to: Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back. Otherwise, replace the gas cap, and/or Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary
Related Codes
P0440 P0441 P0442 P0443 P0446 P0453 P0456


Generic OBD Error Code Details for P0442


Evaporative Emission System Leak Detected (small leak)
What does this mean?
OBD Code P0442refers to
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
Symptoms
Possible sumptoms of OBD code P0442
You likely won't notice any drivability problems.
Causes
Possible causes of OBD code P0442
A code P0442 most likely means one or more of the following has happened: A loose or improperly affixed gas cap A non-conforming gas cap (i.e. not factory/original brand) A small leak/hole in a fuel vapor hose/tube Other small leak in EVAP system Faulty vent o-ring seal
Possible Solutions
With a P0442, the most common repair is to: Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back. Otherwise, replace the gas cap, or Inspect the EVAP system for cuts/holes in tubes/hoses Sources: About.com
Related Codes
P0440 P0441 P0443 P0446 P0453 P0455 P0456

 

Check your fuel filler lines, make sure clamped tight granted a different vehicle but my 99 Taurus had bad filler neck.

 

I went ahead and ordered a new gas cap - figured for $20 I might as well rule it out. Maybe I am just over fixating on the chewed line and missing something else that could be wrong as well. I will recheck all of the hoses this weekend as well.

I wouldnt care about it if not for the emissions. In CT you cant pass with codes and of course this has to happen 1 week before I need to bring it in. I brought it and failed (as I knew I would) just to buy me 60 extra days to get this sorted. Once I get this fixed I am going to hunt down every mouse, rat, chipmunk, squirrel, and capybara I can find.

 

haha...it might take a while to get to the capybara's

 

Thought I would update this thread to help anyone who encounters a similar problem. I finally have it sorted. Because I was getting an evap large leak I was still convinced I should be able to spot it on a physical inspection. The only area that I could not see was above the tank. I dropped the tank and there it was clear as day. Patched with a new piece of fuel line and all is good.