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How did you make out? Did you force ALPHA to perform a regen? The torque return to less than 10%? Wayne

Ok, Misunderstood gauge meaning. Heres what I think is happening. At some point your soot load increased enough for the ECM to call for an active regen. It may or may not have set an EVIC message (DPF at 80% drive at highway speed to remedy)but it did set torque to 100% at that point. Now the...

Your first photo shows engine coolant temp at 140 degrees. If this is after 50 miles of hyway driving you are running way to cool. Should be in the 195 range by now. My understanding is you need at least 170 degrees F to start an active regen and my torque app bears this out. The going to 100%...

Did you measure the voltage on pin 11 with a mulitmeter as the fault can indicate a high or low voltage? What was the reading? Was reading taken right at the connector? Will the engine start and run as there is also a switched power to the "auto stop relay"? The only other connections this fault...

What is the measured voltage on pin 11? Is this right at the connector? The code description states it can be from a high or low voltage. Does the engine start and run? As there is another pin that sends power to the auto stop relay. Only other thing I can think of would be the CAN bus circuit...

If you have power on pin 11 I would strongly suspect the control module. Could also be the CAN buss control wiring but the module would be my first guess. Wayne

My 2017 eco will do a very similar thing. Very violent lost of power then immediately pick back up. The EVIC shows something about low battery voltage. Power saver mode. Only happens when the ambient temps are below freezing and engine is not yet up to temp. Also happens very infrequently. May...

No , the cab heater blowing cold air has nothing to do with heating the DEF tank and lines. Wayne edit: spelling

I believe its located behind the drivers side knee bolster (lower edge of dash). I think a couple bolts on the lower edge then snap pins to remove. Wayne

Sean, I just repaired this fault on my 17 ecodiesel, here's what I found. The trouble shooting SOP mentioned above is spot on. Check fuse 31 for continunity if good check pin 11 on the plug for the heater control module, found on the cross member above the drive shaft near the transfer case...

If it says 80 percent and has not gone into limp (limited power )mode then there are a few other parameters that must be met to go into regeneration. Engine must be above (i believe) 170 degrees f and rpm must be 1500 or greater for at least 1 minute. Then rpm can not drop below 1500 for more...

Finally retired the 2004 GMC and replaced it with a Ram. So Far I'm very pleased with the switch, ask again in 10 years. Lots of good information here so let the transformation begin.

Is this for the complete ECM ? With EGR delete or not?