LML Stock Data Log - Reduced Engine Power Flag REP18?

[VTuner]

I have a local customer with a completely stock 2011 LML - I ran some baseline data logs on his stock tune and I see REP18 indciated and the driver requested torque values were only ~ 700 lb-ft at 2400+ rpm. Maybe that is normal, I see the torque limit tables only allow the max 765 lb-ft at ~ 1700 rpm and the truck did hit 390 hp at ~ 3200 rpm. Can someone comment on what they are typically seeing for driver requested and actual torque on a bone stock LML and what REP18 indicates? No DTC codes reported, truck was not in regen mode, DPF shows 27g, DEF fluid was not low. Customer said that there was a problem previously where his truck was stuck in regen mode and the dealer recently fixed that issue, but he has not seen a regen triggered since the dealer had it over 6 months ago. I did a quick tune with a +65 ft-lb increase and it did pick up ~ 60 ft-lb around 2400 rpm so it is probably fine, just looking for confirmation since this is the first diesel truck I have worked on. Anyone else logging REPFLAG and is REP18 just the normal flag? Stock log attached.
I did look in GM Tech Info and could not find any information on what REP flags 0-36 are assigned to.

Cheers,
Brian

[GMPX]

We just added the descriptions in for those last week, you'll see them soon.
FWIW, REP18 = "DEF Poor Quality"

[VTuner]

Thanks Ross, that might shed some light on the lower than expected stock torque values. DEF pressure increases as NOX reduction efficiency drops, torque is reduced based on higher DEF pump pressure. So REPFlag18 is basically due to NOX sensor 1 - NOX Sensor 2 showing low SCR efficiency.

Cheers,
Brian

[Road]

Have the reduce power descriptions been added yet? If so I can't seem to locate them. I am looking for reduce power 14 currently.

[GMPX]

Yes they should be showing, I am just posting the descriptions from the PID 'GM.REPFLAG'.
However '14' isn't one that we know of sorry.

[Road]

I had one that wouldn't downshift with no codes and the only thing I found was the reduce power 14. I was able to fix the problem with a reflash but the reduce power 14 is always showing. Problem is fixed thanks

[rcr1978]

We just added the descriptions in for those last week, you'll see them soon.
FWIW, REP18 = "DEF Poor Quality"

Were would we find these descriptions I have a rep13 &14? Thanks

Edit: V2 shows rep13 and pass and old v7.5 scan software shows rep14 at the same time
:shock: :wtf1: :wavetowel2: haha

[GMPX]

flip a coin and choose :hihi:
Thanks, we'll check it out.

[rcr1978]

:hihi: ok thanks

[Orange Stroker]

Were would we find these descriptions I have a rep13 &14? Thanks

Edit: V2 shows rep13 and pass and old v7.5 scan software shows rep14 at the same time
:shock: :wtf1: :wavetowel2: haha


Did you ever figure this out? I would love a list of all the REP reasons. I'm showing 13