P0401,P402 codes

Reply Subscribe

Thread Tools

Search this Thread

Nov 10, 2006 | 09:51 AM

97texan

Thread Starter

New User

Joined: Nov 2004

Posts: 9

Likes: 0

P0401,P402 codes

I'm trying to find a fix for these codes on a 97 F150, 5.4L

Nov 10, 2006 | 10:01 AM

macjb

Freshman User

Joined: Sep 2005

Posts: 29

Likes: 0

From: In the garage

Here is a link. Then do a search.

https://www.ford-trucks.com/article/..._Controls.html

Nov 10, 2006 | 10:18 AM

97texan

Thread Starter

New User

Joined: Nov 2004

Posts: 9

Likes: 0

Egr

With engine running, I pulled off line going to EGR Valve and applied vacumn, the engine tried to die.Does this mean the EGR valve is good?What next?

Nov 10, 2006 | 11:13 AM

LEVEL10

Senior User

Joined: Aug 2006

Posts: 334

Likes: 0

From: new jersey

try looking into http://www.obd-codes.com/ this site can help you find what the code is and how to check it out

Nov 10, 2006 | 11:41 AM

Bluegrass 7

Lead Driver

Joined: Sep 2006

Posts: 7,907

Likes: 143

Hello Level 10, If you are not SAM, tell him and the boss I said hello and that my trans is working fine. It's the custom built towing job your shop done with the diesel converter in a 4r70w, out of a red 02 super crew from Pa..

Nov 10, 2006 | 11:45 AM

Bluegrass 7

Lead Driver

Joined: Sep 2006

Posts: 7,907

Likes: 143

97, look at the hoses and stand pipe the DPFE is connected to for cracks , rust etc.
If ok, the DPFE is highly suspect.
Both codes togather suggest this.