"Exhaust gas recirculation flow malfunction". What causes it and how can you fix it.
Dec 2, 2009 at 1:18 AM
Diagnostic code P0400
1997 NISSAN TRUCK
DWRIGHT956
- MEMBER
- 1 POST
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BLUELIGHTNIN6
- ✓ASE Certified Mechanic
- 16,542 POSTS
Hello,
This happens when the EGR valve fails or the passages get clogged up and need to be cleaned out here is a video that shows how to check the valve and the location of the valve below.
https://youtu.be/DqUCbbKdWf4
Check out the diagrams (Below). Please let us know what happens.
This happens when the EGR valve fails or the passages get clogged up and need to be cleaned out here is a video that shows how to check the valve and the location of the valve below.
https://youtu.be/DqUCbbKdWf4
Check out the diagrams (Below). Please let us know what happens.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Dec 2, 2009 at 1:23 AM
I had this problem got a new EGR for $98.00 all fixed I love this site.
Jul 18, 2019 at 12:38 PM
po400/po446 problems what does this means and can i make the reparts myself...or how costly will it be..
Jul 18, 2019 at 12:38 PM
(Merged)
KHLOW2008
- ✓ASE Certified Mechanic
- 41,814 POSTS
Hi MSANN,
P0400 = Exhaust Gas Recirculation flow. Most probably the EGR passage is clogged. You need to clear it of carbon deposits.
P0446 = Evaporative Emission Control System vent control.
Not easy to handle yourself and the cost depends on any replacement parts needed.
P0400 = Exhaust Gas Recirculation flow. Most probably the EGR passage is clogged. You need to clear it of carbon deposits.
P0446 = Evaporative Emission Control System vent control.
Not easy to handle yourself and the cost depends on any replacement parts needed.
Jul 18, 2019 at 12:38 PM
(Merged)
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