P0401 please Help!!!

[Ryan Grant]

Hello All



I have replaced DPFE sensor, egr valve and cleaned egr tube. What else should I do to get rid of this code (egr flow insufficient) Thanks in advance.

 

[Tom Schindler]

Are there vacuum lines to the DPFE sensors? Are they in good condition? Possible vacuum leak?



You vehicle is almost 6 years old, rubber cracks with age.





Tom

 

[Paul H]

try the cracked elbow problem on the vaccum line. lower left side of throttlebody.

good luck

paul h

 

[Todd Z]

Loose connection at the DPFE electrical connector, Low voltage output from the sensor, maybe the replaced sensor is bad ???



Todd Z