NOX Sensor Recalibration

[Utah_ee]

Recently had a CEL pop up on truck (2021 GMC 3500HD Denali Duramax) with only ~900mi. A trip to the stealer identified a service bulletin to reprogram the ECM with calibration updates to correct a software anomaly.

 

Anomaly? Really GM? I could accept something like this for the first units off the line with a new model year, but a year+ later not so much.

 

Anyone else experienced this?

 

 

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[Colossus]

Perfection doesn't happen in this life. 

[Daniel Faulkner]

Same thing just happened to me(2021 Chevy 2500 LT Duramax). 1100 miles light came on.  Took it to the dealership they said the same thing. I haven't driven it much since that happened. Lights off now.

[Utah_ee]

2nd trip with this truck and yet again “Check Engine Light” came on. Has 2100 miles on it now.

 

Scheduling another trip to the stealer to see what it is this time.  I am quite annoyed now, I’ll post an update when I get the truck in for service.

Edited April 5, 2021 by Utah_ee