Seems the di-electric grease had an effect on the connections.
Even dried, the wires have the possibility to entrap water inside the insulation.
The water's entry point being where the wire is terminated with a connector.
It may be cost prohibitive ( not worth it ) to try replacing one of the less expensive passenger side sensors with a used one.
Maybe a wrecking yard, replace the cheapest sensor
and if that code goes away you eliminated the suspect of water damage on a passenger side sensor.
Since these sensors are interconnected in the same circuit,
a water damaged passenger side one or water still within the insulation of the wiring could cause a false sensor error to show driver's side faulty.
Electromagnetic induction where a wire's current flow can travel into another wire such as the airbag sensor giving the error code is possible.
This would hold true especially if the wires had water entrapped in the insulation.
Would drive me bonkers seeing the airbag light on but some would just ignore it and
drive on knowing the time, labor and $$$ involved in making it go off.
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