Quote:
Originally Posted by split71
If BMW uses a thermistor, you can probably figure out what size it is by measuring the sensor resistance with a meter. Typically, thermistors are rated at 25C (77F). I use 10k stainless sheathed NTC type 3 thermistors with and without wells.
I would be more than happy to supply one of these sensors if someone wants to give it a try.
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That is great news to have someone who is familiar with these sensors.
Here's a few more info I was able to dig out.
Code 0046F9 is described as "Reducing-agent active-tank temperature sensor, signal"
The description is: "Sensor monitoring, active tank temperature sensor. The fault is set if the raw sensor signal (voltage) drops below the minimum limit value of 165 mV."