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Rockwood. Ontario | The E3521 code came up today and tractor is depowered. A year and a half ago the DEF pump/doser was replaced. I think that same code was up, but I think there was a second code that time. The DEF that is in was in it all winter (Ontario, Canada) Have put probably 40 hours on this spring, have not added any new DEF. Is my dosing module toasted again or has my DEF salted out and I should replace?? Thanks for any help
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Challenger MT645C Code E3521
