BMW DTC P20AD – Reductant Metering Unit Temperature Sensor Circuit Range/Performance
DTC P20AD meaning on BMW
DTC P20AD on a BMW indicates an issue with the Reductant Metering Unit Temperature Sensor Circuit Range/Performance. This means that the signal from the temperature sensor in the reductant metering unit is outside the expected range or not performing as intended.
BMW DTC P20AD symptoms
Symptoms of DTC P20AD on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Poor fuel efficiency
- Possible DEF (diesel exhaust fluid) system warnings
BMW DTC P20AD causes
Common causes of DTC P20AD on a BMW include:
- Faulty reductant metering unit temperature sensor
- Wiring or connector issues in the sensor circuit
- Software or calibration issues
BMW DTC P20AD seriousness
While DTC P20AD may not cause immediate drivability issues, it is important to address this fault promptly to prevent potential long-term damage to the emissions control system and ensure optimal engine performance.
How to diagnose DTC P20AD on BMW
To diagnose DTC P20AD 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 reductant metering unit temperature sensor circuit
- Test the resistance and voltage of the sensor to determine if it is functioning correctly
- Check for any software updates or calibrations related to the reductant system
How to fix DTC P20AD on BMW
To fix DTC P20AD on a BMW, you can try the following solutions:
- Replace the reductant metering unit temperature sensor if it is found to be faulty
- Repair any damaged wiring or connectors in the sensor circuit
- Perform any software updates or calibrations recommended by the manufacturer
How to erase DTC P20AD on BMW
To erase DTC P20AD on a BMW, you can use a diagnostic scanner to clear the fault code after the underlying issue has been resolved. This will reset the Check Engine Light and allow you to monitor the system for any recurring 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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