BMW DTC U1401 – Invalid Data Received From Wheel Speed Sensor Rear Left
DTC U1401 meaning on BMW
The DTC U1401 code on a BMW indicates that the Engine Control Module (ECM) has detected invalid data being received from the Wheel Speed Sensor located on the rear left wheel of the vehicle.
BMW DTC U1401 symptoms
Symptoms of the BMW DTC U1401 code may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Unusual braking behavior
BMW DTC U1401 causes
Possible causes of the BMW DTC U1401 code include:
- Faulty wheel speed sensor
- Corroded or damaged wiring/connectors related to the wheel speed sensor
- ECM software issue
BMW DTC U1401 seriousness
The DTC U1401 code should be addressed promptly as it can affect the proper functioning of the ABS and traction control systems, potentially compromising the vehicle’s safety and stability during braking and cornering.
How to diagnose DTC U1401 on BMW
To diagnose the DTC U1401 code on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
- Inspect the rear left wheel speed sensor and its wiring for any visible damage or corrosion.
- Test the wheel speed sensor using a multimeter to check for proper resistance and signal output.
- Check the ECM for any software updates or reprogramming that may be required.
How to fix DTC U1401 on BMW
To fix the DTC U1401 code on a BMW, you can try the following solutions:
- Replace the rear left wheel speed sensor if it is found to be faulty.
- Repair or replace any damaged wiring or connectors related to the wheel speed sensor.
- If the issue persists, consider reprogramming or replacing the ECM.
How to erase DTC U1401 on BMW
To erase the DTC U1401 code on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM. After addressing the underlying issue causing the code, clearing the codes will reset the system and turn off the warning lights on the dashboard.