Vito Tourer Door open warning

[laddie1960]

My 2020 Vito Tourer Door open warning light on dash keeps coming on and bleeping just for a couple of seconds when driving round town always saying the rear drivers side passenger door. It doesnt do this on motorway. Does anyone know where the sensor is located on the door so i can check it Thanks

 

[M80]

Assuming it's similar to the 639, there would be 2 pads on the B pillar. The pins on the door contact those.
With a mild kitchen cleaner try giving the pads a clean as 1st step. Be careful not to overdo it as there is a protective coating on the pads.