BMW DTC P2223 – NOx Sensor Heater Sense Circuit Low (Bank 2)
DTC P2223 meaning on BMW
The Diagnostic Trouble Code (DTC) P2223 for BMW refers to an issue with the NOx (Nitrogen Oxide) sensor heater sense circuit on Bank 2. This code indicates that the sensor’s heating element is experiencing a low voltage condition, which can affect the sensor’s ability to accurately measure NOx levels in the exhaust system.
BMW DTC P2223 symptoms
Symptoms of DTC P2223 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Increased emissions
- Possible decrease in fuel efficiency
BMW DTC P2223 causes
Common causes of DTC P2223 on a BMW include:
- Faulty NOx sensor
- Issues with the sensor’s wiring or connectors
- Defective sensor heater circuit
- ECU (Engine Control Unit) software issues
BMW DTC P2223 seriousness
While DTC P2223 may not cause immediate drivability issues, it is important to address this code promptly to prevent potential long-term damage to the vehicle’s emissions system. Ignoring this code can lead to increased emissions and may cause the vehicle to fail emissions tests.
How to diagnose DTC P2223 on BMW
To diagnose DTC P2223 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code
- Inspect the NOx sensor and its wiring for any visible damage or corrosion
- Check the sensor’s heater circuit for continuity and proper voltage
- Test the ECU for any software-related issues
How to fix DTC P2223 on BMW
To fix DTC P2223 on a BMW, the following steps may be taken:
- Replace the faulty NOx sensor if necessary
- Repair any damaged wiring or connectors associated with the sensor
- Check and repair the sensor’s heater circuit if it is faulty
- Update the ECU software to the latest version
How to erase DTC P2223 on BMW
To erase DTC P2223 on a BMW, the fault code can be cleared using a diagnostic scanner. After the necessary repairs have been made, the code can be reset, and the Check Engine Light should turn off. It is important to ensure that the underlying issue causing the fault code has been addressed before clearing the code.
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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