DPF help with code P041D

[Airtime]

Ok so its been almost a year with no DPF and the only code I keep getting is P041D.

The code only goes on in above #2000 feet sea level. Every trip I take up into the mtns the code comes on.

How can I fix this?

Other problems is my 4x4 light on my dash will not come on. How ever the 4x4 light works on the knob.

Any help would be great thanks

[mxracer]

I am making some assumptions as you don't have any info about your truck here but....

Check out post #7 here:

http://www.dieselplace.com/forum/showthread.php?t=285773&highlight=P041D

That, and a couple other codes are labeled as "reserved" in the 7083 OS for LMM's. I went thru and compared to the 8594 OS. There are screen shots in that thread of what to turn off.

[GMPX]

There was a couple of tunes that GM did have some extra DTC's activated, our list was not built from these.
If you want to Email your tune that is setting these codes to support@efilive.com I will see if yours has those hidden ones activated.

Cheers,
Ross