2021 Peterbilt with a CM2450 with error code 1696

[Luckyjayb]

They took the canisters off. I’ve put the new harness on the oem side of the ecm that includes going to the coolant level sensor. Everything there looked fine. I’m leaning towards the canisters side bc the way he did the work, I wouldn’t be surprised that he cut stuff over there. I’m getting correct voltage on the pedal, coolant sensor, fuel level, and doser control unit. I’ll check the others. Thanks again for the help