Glad to hear our capture of the fix helped you out and the fact that your son and you conquered it together makes it even better! :-)
I'm not sure what will accelerate the NOx sensor monitor aside from driving it. Up here in ON they scrapped the emissions testing on passenger vehicles in 2022 and now only test commercial vehicles.
Good luck!
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2003 325xi (1-owner 390,000kms & gtg!)
2015 X5 35d
A HD diesel pick-up & 2 classic Stangs
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