BMW DTC P224B – NOx Sensor Heater Resistance, Bank 1 Sensor 2
DTC P224B meaning on BMW
The Diagnostic Trouble Code (DTC) P224B for BMW refers to an issue with the NOx (Nitrogen Oxide) sensor heater resistance in Bank 1 Sensor 2. This code indicates that there is a problem with the electrical circuit that controls the heater for the NOx sensor in the specified location.
BMW DTC P224B symptoms
Symptoms of DTC P224B on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Reduced engine performance
- Possible increase in emissions
BMW DTC P224B causes
Common causes of DTC P224B on a BMW include:
- Failed NOx sensor heater
- Wiring or connector issues in the NOx sensor circuit
- Faulty engine control module (ECM)
BMW DTC P224B seriousness
The seriousness of DTC P224B on a BMW lies in the potential impact on emissions and engine performance. Ignoring this code can lead to increased emissions and potential damage to the catalytic converter over time.
How to diagnose DTC P224B on BMW
To diagnose DTC P224B on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connectors related to the NOx sensor
- Test the NOx sensor heater resistance using a multimeter
- Check for any visible signs of damage or corrosion in the sensor area
How to fix DTC P224B on BMW
To fix DTC P224B on a BMW, you can consider the following actions:
- Replace the faulty NOx sensor heater
- Repair any damaged wiring or connectors in the sensor circuit
- If necessary, replace the engine control module (ECM)
How to erase DTC P224B on BMW
To erase DTC P224B on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM memory. After fixing the underlying issue, clearing the codes will reset the Check Engine Light and monitor the system for any new faults.
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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