Peugeot Boxer washer fluid sensor issue

That's a head-scratcher. I had a similar problem with my old Renault a few years back. Washer warning light was on even though the reservoir was topped up. Turned out to be a faulty washer motor. Maybe yours is on the fritz? Have you checked the fuse?

Fuse is okay. How do I check the washer motor?

Well, on the Renault, the motor was easy to get to, right next to the washer fluid reservoir. Give it a wiggle, see if it sparks into life. But honestly, messing with electrics can be a pain. If you're not sure, best to get a mechanic to have a look. Could save you a bigger headache down the line. Think of it like a dodgy tap – sometimes best to call a plumber!

Thanks for the advice. Took it to the shop and they replaced the washer motor. Cost me 25€. Problem solved!