2001 Ford Focus egr p0401

[Dirt440]

So I bought this car for 600 bucks and it had a bad shift solenoid a, fixed that no issues. Throws engine code p0402. Replaced egr, dpfe sensor, and the egr vacuum solenoid. Now that I replaced all that I'm throwing a p0401 code for insufficient exhaust recirculation. Problem after problem, any suggestions on where to look?

 

[hotfocus]

I had the same issue with mine and replacing the dpfe sensor fixed the problem. Just to be clear you did replace the egr valve right?

 

[Dirt440]

Yes, the valve and the vacuum operated solenoid that was connected to it


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[hotfocus]

When was the last time you replaced the 02 sensors?

 

[Dirt440]

I haven't touched anything else on the car. I thought it was weird that it went from a excessive exhaust recirculation to insufficient exhaust recirculation


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[hotfocus]

Did you replace the egr vacuum line or check to see if it's too old, cracked or leaking?

 

[FocusMike]

If you have replaced all that then check for vacuum leaks.

 

[Dirt440]

Ok, I'll have to do that after work. I was thinking that. Thanks guys


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[hotfocus]

Any updates?

 

[Dirt440]

I could not find any leaks in the car, I'm not sure what's going on. Everything has its proper voltage, I haven't checked out what the evap test port does yet though


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