2018 Kenworth t880 intermittent low coolant light comes on

[Rawze]

(just some random thoughts)...

== it could be electrical noise issue with the alternator.

== it could be tarnished (discolored) fuses in the fuse panel.

== It could be another sensor tied to the same +5 volts line (like the tranny sensor, etc.) that is dragging down the voltage just enough for ghost alarms in other places. Check ECM wiring diagram for other sensors on the same +5volts supply.

== it could be a bent of pushed-back pin at one of the connectors as well.

== it could be older software in ECM and a newer tank with a slightly different detection range .. creating a mis-match in how the error is detected.

== It could be bubbles getting around the sensor on occasion from combustion gas seepage, etc. into the coolant system.