The leak detection pump is right behind the passenger side headlamp. There is a diagram on the EVAP system system on a label under the hood which depicts its location. I ordered a new LDP from Ebay. I figure it shuold be a simple swap.

Question. What size engine do you have?

 

That's the purge solenoid.

 

updated pictures in post #1. i replaced the 2 big hoses at the evap canister, one was split. also replaced all the little hoses at the purge valve. one was split.

hopefully this will do it.

edit 03/09/12. CEL has been off for 2 months. I'm calling this done.

 

Keep us updated, I have the same codes and might have to do this soon.

 

kinda wondering if my jeep has the same setup as our trucks..... we've been getting p0442, and got p0455 once. i cleared the code last week, and topped off the tank, and the code didnt come back til we got to just under a half tank, so im thinking the rubber hoses are toast. at least its a mopar product, what do you guys think? oh, its a 1998 jeep grand cherokee 4.0 haha

 

Probably the exact same system.....

 

Yup, just a little different in the placement. Thanks for digging this up and doing it with up dates. I have some more hoses to find.

 

would a faulty o2 sensor give a p0455 code?

 

No....

 

http://www.obd-codes.com/p0455

Causes

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