Get the flash codes, or use a scanner to get the codes. Those led lights point you in the direction, but aren't a diagnostic. Here's the ec30 manual, it will tell you how to get the flash codes https://www.anythingtruck.com/instru...eDataSheet.pdf
I don't think ws20's are available anymore, maybe nos, but they're definitely NLA from bendix.
Like I said, the ohm's are irrelevant to the controller, so long as it's within a range to show the coil hasn't been damaged. The controller watches the frequency of the AC wave the sensor creates by the slots moving past it. That light simply means the circuit is open/shorted or it's not seeing the wave when it's seeing a wave from the other 3.
Here is a sensor diagnostic chart from bendix. https://www.bendixvrc.com/itemDispla...ocumentID=7183
I'd be more suspect that it wasn't installed deep enough, over condemning a sensor that didn't match the other 3 but was still within range.