BMW DTC U1243 – Message Monitoring Steering Angle Front Axle Alive Check
DTC U1243 meaning on BMW
The DTC U1243 code on a BMW refers to the Message Monitoring Steering Angle Front Axle Alive Check. This diagnostic trouble code indicates a communication issue related to the steering angle sensor on the front axle of the vehicle.
BMW DTC U1243 symptoms
Symptoms of the BMW DTC U1243 code may include:
- Malfunction indicator light (MIL) illuminated on the dashboard
- Loss of power steering assistance
- Inaccurate steering angle readings
- Stability control system (DSC) or traction control system (TCS) warning lights may be illuminated
BMW DTC U1243 causes
Common causes of the BMW DTC U1243 code include:
- Faulty steering angle sensor
- Wiring or connection issues in the steering angle sensor circuit
- Electronic control module (ECM) communication errors
BMW DTC U1243 seriousness
The DTC U1243 code should be addressed promptly as it can affect the proper functioning of the vehicle’s steering and stability control systems. Ignoring this issue may lead to unsafe driving conditions and potential loss of vehicle control.
How to diagnose DTC U1243 on BMW
To diagnose the DTC U1243 code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s ECM
- Inspect the wiring and connections related to the steering angle sensor
- Test the steering angle sensor for proper operation
- Check for any other related fault codes that may provide additional information
How to fix DTC U1243 on BMW
To fix the DTC U1243 code on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connections in the steering angle sensor circuit
- Replace the faulty steering angle sensor if necessary
- Clear the fault codes from the ECM memory
- Perform a test drive to ensure the issue has been resolved
How to erase DTC U1243 on BMW
To erase the DTC U1243 code on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the ECM memory. Once the codes have been cleared, the MIL light on the dashboard should turn off. It is important to verify that the issue has been properly addressed before clearing the fault codes.
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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