BMW DTC P124D – NOx Sensor Signal Not Available During Operation (Bank 1)
DTC P124D meaning on BMW
DTC P124D on a BMW indicates that the NOx (Nitrogen Oxide) sensor signal is not available during operation in Bank 1. The NOx sensor is a crucial component in the vehicle’s emissions control system, responsible for monitoring and regulating the levels of nitrogen oxide in the exhaust gases.
BMW DTC P124D symptoms
Symptoms of DTC P124D on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Increased fuel consumption
- Possible emission of higher levels of nitrogen oxide
BMW DTC P124D causes
The common causes of DTC P124D on a BMW include:
- Failed NOx sensor
- Wiring or connector issues in the NOx sensor circuit
- Software or calibration issues
BMW DTC P124D seriousness
DTC P124D should not be ignored as it can lead to increased emissions, reduced fuel efficiency, and potential damage to other components of the emissions control system. It is important to address this issue promptly to ensure the vehicle operates efficiently and meets emission standards.
How to diagnose DTC P124D on BMW
To diagnose DTC P124D on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the NOx sensor and its wiring for any visible damage or corrosion
- Test the NOx sensor using a multimeter to check for proper functionality
- Check for any software updates or calibration issues that may be causing the fault
How to fix DTC P124D on BMW
To fix DTC P124D on a BMW, the following steps may be taken:
- Replace the faulty NOx sensor with a new one
- Repair or replace any damaged wiring or connectors in the NOx sensor circuit
- Perform any necessary software updates or calibrations to ensure proper operation
How to erase DTC P124D on BMW
To erase DTC P124D on a BMW, the fault code can be cleared using a diagnostic scanner. After the necessary repairs have been made, the code can be cleared to reset the Check Engine Light and ensure that the issue has been resolved.
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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