Check engine code 401 EGR problem

Old 06-20-08, 10:02 AM
Thread Starter
Join Date: Jun 2008
Posts: 1
Upvotes: 0
Received 0 Upvotes on 0 Posts
Check engine code 401 EGR problem

I have check engine light on since 1 week
I took it to autozone to check the code, it s 401 EGR ............
Please let me know how to fix this problem
I still drive the car without problems so far
Best Regards
Old 06-20-08, 01:46 PM
WTDR-DTY's Avatar
Join Date: Jun 2008
Posts: 89
Upvotes: 0
Received 0 Upvotes on 0 Posts
1. please, post you car specs for specific response.
2. library/chilton will help you locate EGR valve on your vehicle; remove it, i usually simply clean them with carb/choke cleaner; others use coathanger wire to scrape buildup off; thin metal brush will work either. be very careful with the gasket, some of them are made out of thin aluminum and break easy.
with valve off, apply vacuum to it after cleaning, to see if it works. when done, either reset code with scanner (autozone) or disconnect negative cable for few hrs to reset ECM.
clogged EGR may result in engine stalls.
friendly suggestion: use only gas that has cleaning agents added. cheap gas has none of this, with resulting gunk buildup all over and expensive repairs later.

EGR = engine gas recycling (valve)

Last edited by the_tow_guy; 06-20-08 at 06:48 PM. Reason: Not necessary to quote entire post; please use reply button instead.
Old 06-20-08, 06:50 PM
the_tow_guy's Avatar
Group Moderator
Join Date: Feb 2001
Location: SW Fla USA
Posts: 12,113
Received 212 Upvotes on 170 Posts
But before you take it off to clean it, check all the associated vacuum lines; might be that simple.
Old 06-20-08, 07:36 PM
billys68ss's Avatar
Join Date: May 2003
Location: USA
Posts: 1,441
Upvotes: 0
Received 0 Upvotes on 0 Posts
Depending on the vehicle there may be no vacuum lines. Only an electrical connector. We really need to know the Year/Make/Model of the vehicle before we can offer anything other than general information.
Hope this helps ya,

Thread Tools
Search this Thread
Ask a Question
Question Title: