U1229 – BMW DTC

BMW DTC U1229 – Message Monitoring Roadway Tilt Alive Check

DTC U1229 meaning on BMW

The DTC U1229 code on a BMW refers to the Message Monitoring Roadway Tilt Alive Check. This diagnostic trouble code indicates an issue with the system responsible for monitoring the tilt of the roadway.

BMW DTC U1229 symptoms

Symptoms of the BMW DTC U1229 code may include:

• Warning light on the dashboard
• Issues with the vehicle’s stability control system
• Abnormal handling or steering behavior

BMW DTC U1229 causes

Common causes of the BMW DTC U1229 code include:

• Malfunctioning roadway tilt sensor
• Wiring or connection issues in the roadway tilt monitoring system
• Faulty control module

BMW DTC U1229 seriousness

The seriousness of the BMW DTC U1229 code lies in its potential impact on the vehicle’s stability and handling. Ignoring this issue can lead to unsafe driving conditions and compromised control over the vehicle.

How to diagnose DTC U1229 on BMW

To diagnose the DTC U1229 code on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s system.
2. Inspect the roadway tilt sensor and its wiring for any visible damage or corrosion.
3. Check the connections and harness of the roadway tilt monitoring system for loose or damaged components.
4. Perform a system test to verify the functionality of the roadway tilt monitoring system.

How to fix DTC U1229 on BMW

To fix the DTC U1229 code on a BMW, consider the following steps:

1. Replace the faulty roadway tilt sensor if it is determined to be the cause of the issue.
2. Repair or replace any damaged wiring or connections in the roadway tilt monitoring system.
3. If the control module is faulty, replace it with a new one and program it to the vehicle.
4. Clear the fault codes using a diagnostic scanner after completing the repairs.

How to erase DTC U1229 on BMW

To erase the DTC U1229 code 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 confirm the deletion of the DTC U1229 code.
4. Once the code is successfully cleared, disconnect the scanner and start the vehicle to ensure the warning light is no longer illuminated.

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

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