BMW DTC P0548 – Exhaust Gas Temperature Sensor Circuit Low (Bank 2 Sensor 1)
DTC P0548 meaning on BMW
The Diagnostic Trouble Code (DTC) P0548 for BMW refers to an issue with the Exhaust Gas Temperature (EGT) Sensor Circuit on Bank 2 Sensor 1. This code indicates that the signal from the EGT sensor located in the exhaust system of the vehicle is reading lower than the expected range.
BMW DTC P0548 symptoms
Symptoms of DTC P0548 on a BMW may include:
- Illuminated Check Engine Light
- Reduced engine performance
- Increased fuel consumption
- Possible engine misfires
BMW DTC P0548 causes
Common causes of DTC P0548 on a BMW include:
- Defective EGT sensor
- Wiring or connector issues in the EGT sensor circuit
- Exhaust system leaks
- Software or calibration issues
BMW DTC P0548 seriousness
While DTC P0548 may not always result in immediate drivability issues, it is important to address this code promptly to prevent potential damage to the engine or emissions system. Ignoring this code can lead to decreased fuel efficiency and performance.
How to diagnose DTC P0548 on BMW
To diagnose DTC P0548 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the wiring and connectors related to the EGT sensor
- Test the EGT sensor for proper operation
- Check for exhaust leaks or other issues in the exhaust system
How to fix DTC P0548 on BMW
To fix DTC P0548 on a BMW, the following steps may be taken:
- Replace the faulty EGT sensor
- Repair any damaged wiring or connectors in the EGT sensor circuit
- Address any exhaust leaks in the system
- Perform a software update or calibration if necessary
How to erase DTC P0548 on BMW
After the underlying issue causing DTC P0548 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the Check Engine Light and allow the vehicle’s onboard computer to 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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