P0401 You may want to try this
#1
P0401 You may want to try this
I have been fighting the P0401 code and even though my vacuum system worked, ECM solenoid was good and I replaced the EGR valve (non-OEM from AutoZone) I was still getting the code.
I finally assumed the gas flow was restricted and DID NOT want to take the intake off to clean it. I was especially miffed because I had the dealer do the plugs and wires because I was lazy and they didn't clean the manifold when they had it off. Then told me they could clear the code by taking the intake off and cleaning it for $800+. I have a bad opinion of them.
Anyway--the good part. I had been shooting and when cleaning my guns the lightbulb went on. Carbon accumulates from shooting...
So, I got some Hoppes Foaming Cleaner from WalMart for $7, removed the EGR valve and generously foamed both paths to the EGR valve. Then I took my 9mm bore brush on a plastic wand (for flexibility) and scrubbed both sides as far as I could. Yes, it started working. Rinsed with compressed air. Repeat.
After a few times it looked better and by blowing air through both sides it sounded more clear.
Replaced EGR valve and guess what? 300 miles so far and no SES light.
I think it works. Certainly you should try it.
I finally assumed the gas flow was restricted and DID NOT want to take the intake off to clean it. I was especially miffed because I had the dealer do the plugs and wires because I was lazy and they didn't clean the manifold when they had it off. Then told me they could clear the code by taking the intake off and cleaning it for $800+. I have a bad opinion of them.
Anyway--the good part. I had been shooting and when cleaning my guns the lightbulb went on. Carbon accumulates from shooting...
So, I got some Hoppes Foaming Cleaner from WalMart for $7, removed the EGR valve and generously foamed both paths to the EGR valve. Then I took my 9mm bore brush on a plastic wand (for flexibility) and scrubbed both sides as far as I could. Yes, it started working. Rinsed with compressed air. Repeat.
After a few times it looked better and by blowing air through both sides it sounded more clear.
Replaced EGR valve and guess what? 300 miles so far and no SES light.
I think it works. Certainly you should try it.
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