BMW DTC U1240 – Message Monitoring Longitudinal/Lateral Acceleration Signal Error
DTC U1240 meaning on BMW
The DTC U1240 error code on BMW vehicles indicates a Message Monitoring Longitudinal/Lateral Acceleration Signal Error. This fault code is related to issues with the monitoring system that tracks the longitudinal and lateral acceleration signals within the vehicle.
BMW DTC U1240 symptoms
Symptoms of the BMW DTC U1240 error code may include:
- ABS warning light illuminated on the dashboard
- Stability control system malfunction warning
- Unexpected behavior in the vehicle’s handling
BMW DTC U1240 causes
Common causes of the BMW DTC U1240 error code include:
- Faulty longitudinal/lateral acceleration sensor
- Wiring or connection issues in the acceleration signal circuit
- Defective control module responsible for monitoring acceleration signals
BMW DTC U1240 seriousness
The DTC U1240 error code should be addressed promptly as it can affect the vehicle’s stability control system, potentially compromising safety and handling performance. Ignoring this issue may lead to unsafe driving conditions.
How to diagnose DTC U1240 on BMW
To diagnose the DTC U1240 error code on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s system
- Inspect the longitudinal/lateral acceleration sensors for any visible damage or corrosion
- Check the wiring and connections related to the acceleration signal circuit for any faults
- Perform a thorough inspection of the control module responsible for monitoring acceleration signals
How to fix DTC U1240 on BMW
To fix the DTC U1240 error code on a BMW, consider the following steps:
- Replace the faulty longitudinal/lateral acceleration sensor if necessary
- Repair or replace any damaged wiring or connections in the acceleration signal circuit
- If the control module is defective, replace it with a new one
- Clear the fault codes using a diagnostic scanner after completing the repairs
How to erase DTC U1240 on BMW
To erase the DTC U1240 error code on a BMW, use a diagnostic scanner to clear the fault codes stored in the vehicle’s system. Follow the scanner’s instructions to perform the code clearing process properly. Once the fault codes are cleared, ensure that the issue has been resolved by conducting a test drive to confirm that the ABS and stability control systems are functioning correctly.
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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