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What water was I supposed to drink I’m all ears
The difference in DPF and DEF.
A quick recap:
-DPF = diesel particulate filter. It uses fuel to actively clean itself out when plugged with particulate matter or every 24 engine hours. It will eventually get plugged with ash and need replaced.
-DEF = diesel exhaust fluid. DEF is injected into the SCR (selective catalytic reduction) to reduce NOx output.
-DPF and DEF do not work in conjunction with each other.
-Your DPF did not freeze up, there is nothing to freeze.
-The multiple regens in 300km has nothing to do with DEF, and is not normal. Hopefully the DPF just needs one good active regen (I would still recommend a stationary regen, or a long HEAVY towing trip).
-The P242F code is a plugged DPF code, which has nothing to do with DEF. It means active regens have been unsuccessful at cleaning the DPF and/or the DPF may be at the end of it's useful life due to ash loading.
-The fact that it warmed up outside and your truck did a regen is coincidence, the DPF doesn't care what the ambient temp is.
-The dealership was recommended for a stationary regen since you didn't want to go the route of AlfaOBD and a Security Bypass module. This would clean the DPF, something you can't do by removing the DEF nozzle.
-You keep trying to blame the P242F and 100% DPF on DEF, it's not related to DEF.
At 125K km you should still have a warranty on the particulate filter (5 years / 160K km). If the code pops back up take it to the dealership.
What engine oil do you use?