Over the lockdown I took the opportunity to jet wash my car. I don't know whether this is related but I have seen it mentioned elsewhere: can jet washing affect the parking sensors?
I jet washed my car once before lockdown and the parking sensors worked fine after. However after another wash a month later, I noticed the parking sensors stopped working. The parking assist button flashes orange and a beeping tone sounds for 5 seconds.
The car is due for a full health check tomorrow from where I purchased it. I've asked them to have a look into it. Would water ingress from behind the bumper be the cause of this? Or is it the sheer pressure from the jet washer directly onto the sensor itself that has caused the malfunction?

I take it the whole system shuts down if even one parking sensor is faulty.
Has anybody had this issue with an A4 B8.5?

TIA

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