What is the reason for the 03020 fault in the Volkswagen Lavida preventing it from being raised or lowered?
3 Answers
Lavida 03020 fault preventing raising or lowering may be caused by the combination switch ground wire coming loose, main power supply breakage, poor contact or damage to the window relay contacts, coil damage, poor contact or disconnection of the safety switch, insufficient power, etc. Relay contacts: The contacts of a relay are in a normally open or normally closed state, which can be simply understood as the points where the signal is connected or disconnected by the normally open or normally closed switch are called the relay contacts. Insufficient power: It may be caused by insufficient power and needs to be reset. Press the switch to raise the window to the top and hold the switch for more than 3 seconds, then lower the window to the bottom and hold for 3 seconds.
My Lavida also had this issue before, the window just wouldn't budge. After troubleshooting, I found the main culprit was the Hall sensor inside the window regulator motor - that little thing detects motor position, and once it fails, the system defaults to fault lockout. Poor contact in switch wiring is also quite common; last time after rain, the corroded connector in my door caused signal interruption. The control module itself can act up too - voltage fluctuations or software bugs may trigger the 03020 error code. The most annoying is when the anti-pinch function misfires; aged window seal strips jamming the glass can make the system mistakenly detect an obstruction and cut power. In such cases, it's best not to force the switch - removing the door panel for inspection is the only way to accurately diagnose the problem.
Last week, my neighbor's Lavida also had the 03020 fault where the window wouldn't go down, and I went over to help him check it out. The root cause lies in the system's protection mechanism—the window will lock if the lifting resistance is too high, either due to dirty guide rails with sand particles or frayed steel cables getting stuck. Power supply issues could also trigger the fault code, such as aging and broken door wiring harnesses or poor fuse contact. I suggested trying to reinitialize first: hold the down button for ten seconds, then hold the up button for ten seconds. A clicking sound indicates a successful reset. If there's no response, the circuit needs to be checked, with a focus on the cables at the door-to-body hinge area, as they are prone to damage there.
