BMW DTC P124E – NOx Sensor Signal Not Available On Startup (Bank 2)
DTC P124E meaning on BMW
DTC P124E on a BMW indicates that the NOx (Nitrogen Oxide) sensor signal is not available on startup for Bank 2. This means that the engine control module (ECM) is not receiving the expected signal from the NOx sensor located in Bank 2 of the vehicle.
BMW DTC P124E symptoms
Symptoms of DTC P124E on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Increased emissions
- Possible engine misfires
BMW DTC P124E causes
Common causes of DTC P124E on a BMW include:
- Defective NOx sensor
- Wiring or connector issues in the NOx sensor circuit
- ECM software or hardware issues
- Exhaust system leaks
BMW DTC P124E seriousness
DTC P124E should not be ignored as it can lead to increased emissions and potential engine performance issues. It is important to address this fault promptly to ensure proper vehicle operation and compliance with emissions regulations.
How to diagnose DTC P124E on BMW
To diagnose DTC P124E on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the wiring and connectors in the NOx sensor circuit for any damage or corrosion
- Test the NOx sensor for proper operation using a multimeter or scan tool
- Check for exhaust leaks that may affect NOx sensor readings
How to fix DTC P124E on BMW
To fix DTC P124E on a BMW, you can try the following solutions:
- Replace the faulty NOx sensor in Bank 2
- Repair any damaged wiring or connectors in the NOx sensor circuit
- Update the ECM software to the latest version
- Inspect and repair any exhaust leaks in the system
How to erase DTC P124E on BMW
To erase DTC P124E on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. After addressing the underlying issue causing the fault code, you can reset the MIL and monitor the vehicle for any recurring issues.