U1220 – BMW DTC

BMW DTC U1220 – Lost Communication With 10ms Task

DTC U1220 meaning on BMW

The Diagnostic Trouble Code (DTC) U1220 for BMW indicates a ¨Lost Communication With 10ms Task¨ error. This means that the vehicle’s onboard computer system has lost communication with a specific component or module that is expected to respond within a certain time frame.

BMW DTC U1220 symptoms

Symptoms of the BMW DTC U1220 may include:

• Check Engine Light (MIL) illuminated on the dashboard
• Loss of communication with certain vehicle systems
• Erratic behavior of electronic components

BMW DTC U1220 causes

The causes of the BMW DTC U1220 can vary, but common reasons include:

• Faulty wiring or connections
• Defective control module
• Interference from other electronic devices

BMW DTC U1220 seriousness

While the U1220 DTC may not always result in immediate drivability issues, it is important to address the underlying cause promptly. Ignoring this code could lead to further electrical problems or malfunctions within the vehicle.

How to diagnose DTC U1220 on BMW

To diagnose the DTC U1220 on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the specific fault codes stored in the vehicle’s computer system.
2. Inspect the wiring and connections related to the component that is not communicating properly.
3. Check for any signs of physical damage or corrosion in the affected areas.
4. If necessary, perform a communication test to identify the exact source of the issue.

How to fix DTC U1220 on BMW

To fix the DTC U1220 on a BMW, consider the following steps:

1. Repair or replace any damaged wiring or connectors associated with the affected component.
2. If the control module is faulty, replace it with a new or refurbished unit.
3. Ensure that there is no interference from external electronic devices that could disrupt communication.
4. Clear the fault codes using a diagnostic scanner after completing the repairs.

How to erase DTC U1220 on BMW

To erase the DTC U1220 on a BMW, follow these steps:

1. Connect a diagnostic scanner to the vehicle’s OBD-II port.
2. Access the scanner’s menu and select the option to clear fault codes.
3. Follow the on-screen prompts to erase the stored DTC U1220 from the vehicle’s computer system.
4. Verify that the code has been successfully cleared by rescanning the system.

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.