2011 LML DURAMAX. First time on Forum

[Bobbygreen1972]

I have a 2011 LML. It is fully deleted. It has been running great. Then one day it has lost its power. Like the catalytic convertor was stopped up. If it had one. I've cleaned MAF and MAP SENSORS. Changed fuel filters. Had dealer check fuel rail pressure. Air filter is new. No check engine light on the dash. But when I use my efi live tuner to scan this comes up. $0322. I had some say that this means ECM is not functioning properly. If any could give me some help I would be greatly appreciative.

[Woody35]

Does the code come back after you erase the code?

[Bobbygreen1972]

I haven't tried to erase the code. Have you ever seen anything like this before?

[killerbee]

That is not an obd code. It is an efilive error message. You may not be able to read codes if your ecm is damaged, or you dont have connectivity to it. You experienced a derate limp mode, but to determine why, you need to read, record, and then delete the diagnostic codes. Or you can send the ecm to us and we will evaluate it.

[Omega_5]

Take a reading of the voltage at the ECM and OBD port.
ECM + to battery ground, ECM + to ECM -
OBD + to battery ground, OBD + to OBD -

You'll probably find it's a power issue. Pretty common on vehicles of that age.

[Bobbygreen1972]

Thank y'all so much. I really appreciate the help. I will test the voltage and then go from there.