U0220: Lost Communication With Door Switch F

What it means

The reporting module has lost communication with door switch F. It sets this code when expected switch messages are not received for a specified time.

How it works

Door switch F communicates whether its associated door is open or closed to other vehicle modules. U0220 sets when the reporting module misses the expected network messages from switch F for a specified period.

Common causes

Most likely first.

1. Switch power or ground fault
2. Damaged or corroded wiring or connectors
3. CAN bus fault
4. Door switch F failure
5. Low battery voltage

Symptoms

• Door status may display incorrectly
• Door warning or courtesy light may malfunction
• Other communication codes

How to diagnose it

1. Read all module codes and freeze-frame data to check whether U0220 is isolated or accompanied by low voltage or broader network faults.
2. Open and close the door associated with switch F while checking whether its status display and courtesy light follow the door consistently.
3. Inspect switch F's connector and the wiring through the door flex point for corrosion, loose connections, or physical damage.
4. With the wiring diagram, verify power and ground at switch F and check its network conductors for opens or shorts.
5. If supply and network wiring are correct, test switch F's operation and communication using the manufacturer's procedure.

Common fixes

• Charge the battery if low voltage is recorded.
• Clean and reconnect a loose or corroded switch F plug.
• Repair damaged door wiring or restore a failed power or ground connection.
• Correct a confirmed network wiring fault affecting switch F.
• Replace switch F if it does not pass its specified test with the circuit intact.

Can I keep driving?

Driving is generally possible only if the door closes and latches properly; check it before moving off. Door F's status may be displayed incorrectly, and its warning or courtesy light may not behave normally.