What do you feel? When you engage reverse, you hear a long, continuous beep for 3 seconds, and then the system stops working. The message “Parking assistance system malfunction” appears on the dashboard.
The Logic of the System: The sensor control unit performs a “check-up” every time you engage reverse gear. It sends a sound wave and waits for a response. The code B1003 indicates that the control unit is “lost,” or one of the sensors is sending an impossible signal (as if there were a wall stuck to it all the time).
- Possible Solution: First, check if there is dirt or polishing wax covering one of the four sensors on the bumper. A simple layer of dirt causes the wave to bounce and cause the error. If it’s clean, the culprit is usually a sensor that has suffered water infiltration after a high-pressure wash. To find out which one it is, with reverse gear engaged (and the engine off), put your ear to each sensor: which one is faulty? if it is not making a “click-click-click” sound The one that needs to be replaced is very low.
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