Help Mazda B2300 P0401 code

[Greivinsc]

Hi guys I have a problem in my truck, the check engine light is on, and the code is P0401 records and change the EGR valve, clean the trothle body but the light is still on I need someone can help me solve this problem.

thanks and greetings from Costa Rica

 

[Earl43P]

P0401, EGR Flow Insufficient, is almost always a faulty DPFE.

http://www.tomco-inc.com/Tech_Tips/ttt35.pdf
http://www.tomco-inc.com/Tech_Tips/ttt36.pdf

^ Those links should explain it.

 

[Greivinsc]

Egr

Hi thanks for replying, and change the EVR and the EGR and the problem continues, the truth as I can not solve this problem, I do not like seeing that check engine light turned on ...

 

[Mazda]

P0401, EGR Flow Insufficient, is almost always a faulty DPFE.

Like he said it is the DPFE. But before you change it out check out this site it will help you diagnose it.

http://easyautodiagnostics.com/ford_egr_test/ford_egr_valve_1.php

First off check the two hoses that come from the egr pipe to the DPFE. Mine were coming off from time to time and giving me the code. I put on some hose clamps and haven't had a problem since.

Bryan

 

[Greivinsc]

B2300

Hi Bryan thanks for the info I will check it.

greetings and thanks