Code p0404

2005 HONDA CIVIC
140,000 MILES
Avatar
DAVIMMS
  • MEMBER
  • 3 POSTS
I was wondering if i should replace my egr valve? I had a p0404 code so I took the valve off and cleaned it with TB cleaner..replaced the egr valve gasket and reinstalled it on my honda....Cleared the code drove for 10 mins and the code came back..p0404...I was told i should replace the egr valve...I don't think the egr passages are clogged because that would threw a Code: P0401 Insufficient EGR Flowcode and I never did get that code...

The car runs great...No hesitation at all...I would have never knew there was a problem if the check engine light didn't come on...
Apr 16, 2012 at 9:01 AM
Advertisement
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
if you are going to chemically clean teh egr use a decarbonizer. all auto dealers should have it, ford and gm use the same stuff it take a little bit for it to soak then drive it see if that cures it if not then a new egr
Apr 16, 2012 at 11:04 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle