Def shouldn't freeze no matter how cold is, it's the heater who's not doing the job.Just noticed that my dic is saying that the diesel exhaust fluid is down to 35%. Problem is, I just poured in a big jug last month. So it should be about 80% full as the def normally lasts me 5-6 months.
Is it possible that the def tank is frozen and the only fluid available is in the centre reservoir where the heater is? it could be reporting on a diminishing supply with a frozen block of fluid. With our really cold temps, I wonder if the def tank heater is up to the job...
An online search reveals that def freezes at -11 ˚C or 12 F˚. It also says that the heaters should be able to handle it.
My driving has changed to mainly around-town trips. Could I be using more def than highway driving?
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