After a car wash I got the message parking sensors not activated and I had error messages on my front and side parking sensors and maneuver breaking would not work, so I sprayed WD-40 on each of those sensors, cleaned it off, then wiped off the remaining WD-40 with Windex, or some other kind of cleaner, and then I did a resetwhere you lock the car and walk away and then you walk back up to the car open it get inside shut the door, buckle your seatbelt and then put your foot on the break and it reset the system. Hope this helps