Trouble codes

Reply Subscribe

Thread Tools

Search this Thread

Nov 12, 2007 | 10:21 AM

deercreek1

Thread Starter

Senior User

Joined: Mar 2007

Posts: 145

Likes: 0

From: Minnesota

Trouble codes

Can anyone help me with 2 trouble codes as to what they are? I have PO403 and PO404. I suspect it might have something to do with my EGR as I had unplugged it yesterday to diagnose a problem. Thanks

Nov 12, 2007 | 10:50 AM

npccpartsman

Hotshot

Joined: Dec 2003

Posts: 15,368

Likes: 121

From: Stuttgart, Ar

Yes, they are both EGR related codes. Here they are: http://dan.prxy.org/Truck/6L_bible_h...l/Page_95.html

Probably an '05 or later truck?

Nov 12, 2007 | 10:54 AM

deercreek1

Thread Starter

Senior User

Joined: Mar 2007

Posts: 145

Likes: 0

From: Minnesota

Thanks! Any idea if these codes are from me disconnecting the EGR or are from an earlier event???

Nov 12, 2007 | 10:56 AM

npccpartsman

Hotshot

Joined: Dec 2003

Posts: 15,368

Likes: 121

From: Stuttgart, Ar

There's no way to tell. Plug it back in, clear the codes and drive it again. If you have an EGR problem it will show back up. What year model is your truck?

Nov 12, 2007 | 11:03 AM

deercreek1

Thread Starter

Senior User

Joined: Mar 2007

Posts: 145

Likes: 0

From: Minnesota

It is an 05 with 97,000 miles on it. It was "bucking" when going up hill. I do have a Bullydog in it but was planning on removing it before going into the Dealer next week.

Nov 12, 2007 | 11:16 AM

03f2506.0

Senior User

Joined: Jun 2006

Posts: 189

Likes: 0

From: Bridgewater, NJ

When I unpluged my EGR those 2 codes came up and the cel went on. Most likely it's from you unpluging it but clear the codes like they said and see what happens.

Nov 12, 2007 | 11:50 AM

ramsey_71

Senior User

Joined: Apr 2007

Posts: 143

Likes: 0

My pickup always threw a code when I had a bully dog. I have an '06. Unfortunately I can't remember what the code was right off. I had it written down but I can't find it anymore. I do remember that it was one that Bully Dog mysteriously left off of their list of codes on their website.

I hope you are having better luck with the BD than I did. I will try to look again and find the code number that I always got.