Evaporative Emission System Problem

Hi Group,

I just got a P0455 (Gross leak detected in the Evaporative Emission
System. Should I be looking for a deteriorated hose? What is the best
way to troubleshoot this? It's a 2002 Caravan SE.

 

First check to ensure the gas cap is in good shape and properly installed.

 

Is there a fast way to check the gas cap other than it looks visually
ok and it appears to be fastening to the filler tube correctly? Thanks
for your comments.

 

Service shops have gas cap testers. You probably don't. The only other
fast way to check it is to substitute a new or known-good cap.

 

If the cap looks to be in good shape the only real way to check for leaks is
with a smoke test, The shops with this equipment inject smoke into the
evaporative system and any leaks show up as a dye or the actual smoke
emitting from the leak.
The two most popular leaks that will set a large leak on that van is the
rubber hose under the van that runs to the canister and connects to the
steel line.
The other large leak is a small rubber hose under the air cleaner.

Glenn Beasley
Chrysler Tech

 

Glenn,

You hit it right on the nose!! Big crack in hose that runs to the
canister and connects to the steel line. Thank you so much.

 

I think I got a code like that on my 96 Town and County once. I reset the
codes and it never came on again. You might try that to make sure you
really have a problem.

 

yes especially under the vehicle by the vapor canister oh yea the gas might
be loose or bad

 

without a scan tool to set up a monitor test it's a waste of time except to
inspect the cap and look for any rust in the middle if there is the cap is bad