help! EGR flow insufficient!!!

[mustang98gt]

couple of weeks ago the check engine light and i took it to autozone to get the code and the code was PO401 and it said EGR flow insufficient... plz help!

 

[Willis_98GT]

delete it.

if you dont want to go that route then check for leaks..

 

[AaRoN]

You probably have a bad line or the EGR is plugged.

 

[GDTrumbo]

I've read of cases where the EGR tube running to the exhaust manifold was restricted due to carbon build up. The tube had to be removed and cleaned out.

GT

 

[vermilion]

some cases with header installs, people cross-thread the egr tubing which leads to improper torquings and leaks. behind the engine near the heads are rubber hoses connecting the egr main tubing.

 

[mustang98gt]

another thing that i have notice is that it has lost a lot of power and it revs up really fast! i dont know what to do

 

[vermilion]

theres no other lean codes? if not clean or replace egr valve. brake cleaner and small brush.

 

[mustang98gt]

no its just that code

 

[vermilion]

look for vaccum leaks from the rubber hose on top of egr valve and chase it. or clean it.

 

[Gregor185]

dpfe

 

[Roadhawg]

My brother had this same code on his 96 Gt.
We found the small metal tubes coming off the EGR going to the DPFE were clogged with carbon.
We removed the carbon deposits by using a small metal brush on a cordless drill and a bit of crab cleaner.