BMW DTC P2044 – Reductant Temperature Sensor ‘A’ Circuit Low
DTC P2044 meaning on BMW
DTC P2044 on a BMW indicates a fault with the Reductant Temperature Sensor ‘A’ circuit. This sensor is responsible for monitoring the temperature of the diesel exhaust fluid (DEF) or AdBlue solution in the Selective Catalytic Reduction (SCR) system. The circuit low fault suggests that the sensor is reporting a temperature below the expected range.
BMW DTC P2044 symptoms
Symptoms of DTC P2044 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Possible DEF system warnings
BMW DTC P2044 causes
Common causes of DTC P2044 on a BMW include:
- Defective Reductant Temperature Sensor ‘A’
- Wiring or connector issues in the sensor circuit
- Faulty SCR system components
BMW DTC P2044 seriousness
The seriousness of DTC P2044 on a BMW lies in its potential to affect the proper operation of the SCR system. If left unresolved, it can lead to increased emissions, reduced fuel efficiency, and potential damage to the catalytic converter.
How to diagnose DTC P2044 on BMW
To diagnose DTC P2044 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the Reductant Temperature Sensor ‘A’ and its wiring for any visible damage
- Test the sensor’s resistance and voltage output
- Check the SCR system components for proper operation
How to fix DTC P2044 on BMW
To fix DTC P2044 on a BMW, the following steps may be taken:
- Replace the Reductant Temperature Sensor ‘A’ if found to be faulty
- Repair any damaged wiring or connectors in the sensor circuit
- Clear the fault code and perform a test drive to ensure the issue is resolved
How to erase DTC P2044 on BMW
To erase DTC P2044 on a BMW, the fault code can be cleared using a diagnostic scanner. After the repair has been completed and the underlying issue resolved, the code can be cleared to reset the Check Engine Light and ensure proper system operation.
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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