2019 VNL day cab with a D13, will be driving along and Coolant Level Critical warning will come on and off while driving.
I think it is either the coolant reservoir tank or sensor.
I pulled the sensor to check ohms reading.
The sensor reads 170 ohms resting, then on the top of the sensor there are two trigger points about 1/4″ apart ready 2,690 ohms.
Not sure how the sensor / reservoir work together to set the warning.
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