Common evap system leaks? - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus First Generation > MK1 Focus

MK1 Focus The place to chat about general questions, window tinting, exterior body, interior and lighting upgrades for the first generation 2000-2007 Focus.

Search This Forum | Image Search | Advanced Search    
FocusFest

Like Tree1Likes
  • 1 Post By amc49
Reply
 
LinkBack Thread Tools Display Modes
Old 11-09-2019, 12:03 PM   #1
Focus Rookie
 
Join Date: Aug 2018
Fan#: 403857
Posts: 15
Points 157, Level 3
Points: 157, Level: 3 Points: 157, Level: 3 Points: 157, Level: 3
Level Up 14% Completed
Level up: 14% Level up: 14% Level up: 14%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 1 stubborn1 Good Standing Member
Buy-Sell-Trade Rating: (0)
Common evap system leaks?

Went through my daughters 05 Focus today and see she is now throwing two codes. The P0420 I know about and have decided to ignore until before next emission test in the summer. The new code is P0442 - evap emission control leak small. The car is running just fine but if it's something simple as a cracked vacuum hose I would like to fix it.

Are there common failure points on these vehicles where I should start checking first?


stubborn1 is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-11-2019, 10:06 AM   #2
Focus Enthusiast
 
Join Date: Jan 2017
Fan#: 339178
Location: Boiling Springs, PA
What I Drive: 2012 SEL Hatch, 2003 Cent. Sedan

Posts: 403
Points 912, Level 16
Points: 912, Level: 16 Points: 912, Level: 16 Points: 912, Level: 16
Level Up 12% Completed
Level up: 12% Level up: 12% Level up: 12%
Forum Activity 48%
Activity: 48% Activity: 48% Activity: 48%
FF Reputation: 3 IrishBrewer Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by stubborn1 View Post
Went through my daughters 05 Focus today and see she is now throwing two codes. The P0420 I know about and have decided to ignore until before next emission test in the summer. The new code is P0442 - evap emission control leak small. The car is running just fine but if it's something simple as a cracked vacuum hose I would like to fix it.

Are there common failure points on these vehicles where I should start checking first?
You can fabricate your own smoke test machine with just a few parts, many of which you might have lying around the house (check YouTube). The consumable is just regular mineral oil. Hook it up to a 12V battery and use a bike pump to push the smoke through your brake booster line to see if you can pinpoint the leak. Also, the P0420 code points to the bank 1 O2 sensor or the catalytic converter. By far, the cheaper of the two is the 02 sensor and if that's what it is and you let it go for too long, that can cause damage to the cat so I would try to address that as soon as you can also.

Last edited by IrishBrewer; 11-11-2019 at 10:10 AM.
IrishBrewer is offline  
    Reply With Quote Quick reply to this message
Old 11-11-2019, 04:32 PM   #3
Focus Fanatic
 
Join Date: Mar 2012
Fan#: 96610
Location: Fort Worth, TX
What I Drive: 00 wagon, 02 sedan both zetec atx

Posts: 15,390
Points 9,511, Level 65
Points: 9,511, Level: 65 Points: 9,511, Level: 65 Points: 9,511, Level: 65
Level Up 54% Completed
Level up: 54% Level up: 54% Level up: 54%
Forum Activity 100%
Activity: 100% Activity: 100% Activity: 100%
FF Reputation: 62 amc49 Excellent Standing Member
Buy-Sell-Trade Rating: (0)
X2 on running the 420 code longer, you may cause it to be permanent requiring the cat to be changed. Bank 1 sensor TWO is the second one, and the one you are concerned with.

Fuel tank cap either loose or a bad seal on it is the most common cause of a small evap leak.

One can use a cheap Harbor Freight base tire air compressor for the smoke machine pump, I've gotten them for as low as $6 before and perfect for that.
BammBamm_USA likes this.
__________________
Fix the driver first, then fixing the car becomes so much easier..........
amc49 is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-12-2019, 07:37 PM   #4
Focus Rookie
 
Join Date: Aug 2018
Fan#: 403857
Posts: 15
Points 157, Level 3
Points: 157, Level: 3 Points: 157, Level: 3 Points: 157, Level: 3
Level Up 14% Completed
Level up: 14% Level up: 14% Level up: 14%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 1 stubborn1 Good Standing Member
Buy-Sell-Trade Rating: (0)
Thanks for the ideas on the cheap home smoke machine. I think I have half the parts already and now this gives me the excuse to go buy the rest.

Regarding the P0420, it's been on for about a year. I played around last year trying to fix. Replaced the O2 sensor with no change. The cat is the issue. I haven't determined if I'm willing to throw the cash at a replacement yet.
stubborn1 is offline  
    Reply With Quote Quick reply to this message
Old 11-19-2019, 02:51 AM   #5
Focus Fanatic
 
Join Date: Mar 2012
Fan#: 96610
Location: Fort Worth, TX
What I Drive: 00 wagon, 02 sedan both zetec atx

Posts: 15,390
Points 9,511, Level 65
Points: 9,511, Level: 65 Points: 9,511, Level: 65 Points: 9,511, Level: 65
Level Up 54% Completed
Level up: 54% Level up: 54% Level up: 54%
Forum Activity 100%
Activity: 100% Activity: 100% Activity: 100%
FF Reputation: 62 amc49 Excellent Standing Member
Buy-Sell-Trade Rating: (0)
If the cat gets completely clogged then the engine will burn valves FYI. But by then it won't be running likely anyway. It CAN get worse, the damage is time based.
__________________
Fix the driver first, then fixing the car becomes so much easier..........
amc49 is offline  
    Reply With Quote Quick reply to this message
Reply

Bookmarks & Social Networks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum 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:

Log-in


Thread Tools
Display Modes

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



All times are GMT -5. The time now is 03:30 AM.


Copyright 2002-2015 FocusFanatics.com. All Rights Reserved : : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Mazda CX-3, Audi S3, Mazda MX-5 Miata and Acura TLX. You can find all Ford Focus, Focus ST and Focus RS related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. If you own other makes have a look at Challenger Hellcat Forum, Charger Hellcat Forum, Cadillac ATS-V Forum, Cadillac CTS-V Forum, Lexus RC-F Forum, Lexus GS-F Forum, Mercedes GLA Forum, Mercedes GLE Forum and Volvo XC90 Forum.




 

Search Engine Optimization by vBSEO 3.6.1