U0521

Invalid Data Received From Door Switch F

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–33 (est.)

Symptoms

Incorrect operation of the central locking
Malfunction of interior lighting when opening doors
Errors on the dashboard
Inability to activate some comfort functions

Causes

Door sensor malfunction
Damage to wiring or connectors
Short circuit in the sensor circuit
Software error in the control unit
Mechanical damage to the door

How to Fix

Check the status of the door sensor
Inspect wiring and connectors for damage
Check sensor circuit for short circuit
Update control unit software
Replace the door sensor if necessary

Related codes

U0520 U0522 U0523