Evap code - Jeep Patriot Forums
Engine and Drivetrain Engines, transfer cases, transmissions and axles

 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 05-05-2019, 03:33 PM Thread Starter
Senior Member
 
Join Date: Feb 2013
Posts: 160
 
Evap code

My wife's 2014 patriot has developed the evap code p0456 at about 101,000 miles. In the nature of full disclosure it was two quotes low on oil. I know the evap system has no bearing on oil/lubrication system.

So now I have to get this cleared up by the end of the mouth. The NYS inspection is due. In my research it can be attributed to the gas cap or the purge take or canister. I can start with replacing the fuel cap, however I am not sure if that is the root cause. There is a ridge of rust developing on leading edge of the filler neck.

I think my plan is as follows.
Smear some petroleum jelly around the seal of the fuel cap. If that doesn't work, I'll replace the gas cap.



Last edited by thesavo; 05-06-2019 at 12:29 PM.
thesavo is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 05-07-2019, 08:31 AM
Junior Member
 
Join Date: Oct 2018
Location: Southwest Ohio
Posts: 29
 
I have been dealing with the same code after rain or high humidity. I just replaced the purge valve yesterday.

Here is my post:

https://www.jeeppatriot.com/forum/15...ml#post1859485
MacGarage is offline  
post #3 of 10 (permalink) Old 05-07-2019, 03:52 PM Thread Starter
Senior Member
 
Join Date: Feb 2013
Posts: 160
 
I was thinking of that. I wanted to test it first. I couldn't figure out how to actuate it. I figured I could remove it and try the blow test.

I couldn't find a 2014 diagram on BBBMotor. I found one for a 2013. It looks like both leads for the purge solenoid go to the PCM. So I am not sure which is hot and ground. I will have to get a test light to figure out the polarity.

Sent from my SM-N950U using Tapatalk

Last edited by thesavo; 05-07-2019 at 04:16 PM.
thesavo is offline  
 
post #4 of 10 (permalink) Old 05-07-2019, 06:30 PM Thread Starter
Senior Member
 
Join Date: Feb 2013
Posts: 160
 
So odd. I found the purge valve.

Once the rain stops I'll pull it and see what condition it is in. The light went out but the code remains. Isn't that odd. The Mil went out after I dropped the hood.

Maybe the purge valve is ready to go.


Sent from my SM-N950U using Tapatalk
thesavo is offline  
post #5 of 10 (permalink) Old 05-09-2019, 07:32 PM Thread Starter
Senior Member
 
Join Date: Feb 2013
Posts: 160
 
Purge valve holds vacuum. Need to test the vent and the lines next. Click image for larger version

Name:	Screenshot_20190509-193101_Gallery.jpg
Views:	6
Size:	30.6 KB
ID:	81353

It lost two ticks of inHg over the course of 5 minutes. I have to check the specs.

Sent from my SM-N950U using Tapatalk

Last edited by thesavo; 05-09-2019 at 08:37 PM.
thesavo is offline  
post #6 of 10 (permalink) Old 05-09-2019, 08:49 PM Thread Starter
Senior Member
 
Join Date: Feb 2013
Posts: 160
 
I might take it to a shop and get it smoke tested. However, I think without more sophisticated tools, I think I might be chasing my tail.

The best thing to I have is an OBDLink MX. I don't think that is enough to trigger the respective tests. My purge seems to be holding vacuum. I am not brave enough to just put 12v on the leads. I think the canister vent is 12 volt controled. That could be the next test.

The Mil has gone out, and the p0456 code remains, also the fuel system is not in a ready state.
I am not sure if I should pursue and it may just need to be driven under the right conditions.



Sent from my SM-N950U using Tapatalk

Last edited by thesavo; 05-09-2019 at 11:21 PM.
thesavo is offline  
post #7 of 10 (permalink) Old 05-14-2019, 10:54 AM
Junior Member
 
Join Date: Nov 2011
Posts: 20
 
It's the rust on the sealing surface of the neck, especially on the left where the weld seam is.
Take a flat surfaced block ( I have a 2 inch square marble tile ) wrap some fine sandpaper around it and polish up the neck surface till it's smooth again.
jimtom is offline  
post #8 of 10 (permalink) Old 05-14-2019, 02:26 PM Thread Starter
Senior Member
 
Join Date: Feb 2013
Posts: 160
 
Quote:
Originally Posted by jimtom View Post
It's the rust on the sealing surface of the neck, especially on the left where the weld seam is.

Take a flat surfaced block ( I have a 2 inch square marble tile ) wrap some fine sandpaper around it and polish up the neck surface till it's smooth again.
Like Emory cloth for copper pipe?

Sent from my SM-N950U using Tapatalk
thesavo is offline  
post #9 of 10 (permalink) Old 05-14-2019, 02:57 PM
Member
 
Join Date: Apr 2018
Posts: 30
 
Seems like my only issue when i had that code was replacing the gas cap. My wife hates taking the new one off. Its on so much tighter.
gregory_tolson is offline  
post #10 of 10 (permalink) Old 05-14-2019, 07:26 PM Thread Starter
Senior Member
 
Join Date: Feb 2013
Posts: 160
 
I ordered a new gas gap. I'm going to try that since I don't have any sand paper in stock.
We had a trip this weekend and none the incomplete tests ran. We will see if this helps while I get some sand paper

Other Chrysler owners claim it fixed for them in the reviews.


Sent from my SM-N950U using Tapatalk
Attached Thumbnails
Click image for larger version

Name:	Screenshot_20190512-135041_Torque.jpg
Views:	4
Size:	29.9 KB
ID:	81373  

Last edited by thesavo; 05-14-2019 at 07:28 PM.
thesavo is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Jeep Patriot Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Issue with EVAP system CEL code P0441 gregory_tolson Jeep Patriot General Discussion 5 05-14-2019 02:56 PM
P0441 EVAP Emission Control System code tnvarmint Engine and Drivetrain 3 04-30-2019 12:34 PM
help wih evap code hoopdawg Jeep Patriot General Discussion 0 05-15-2018 06:37 PM
2008 throwing a PO 456 evap emission system code Etnie Jeep Patriot General Discussion 2 04-08-2016 10:01 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome