P0549 – BMW DTC

BMW DTC P0549 – Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 1)

DTC P0549 meaning on BMW

DTC P0549 on a BMW indicates a problem with the Exhaust Gas Temperature (EGT) Sensor Circuit High for Bank 2 Sensor 1. This fault code is triggered when the Engine Control Module (ECM) detects a high voltage signal from the EGT sensor in the exhaust system.

BMW DTC P0549 symptoms

Symptoms of DTC P0549 on a BMW may include:

• Illuminated Check Engine Light
• Reduced engine performance
• Increased fuel consumption
• Possible engine misfires

BMW DTC P0549 causes

Common causes of DTC P0549 on a BMW include:

• Faulty Exhaust Gas Temperature (EGT) Sensor
• Wiring or connector issues in the EGT sensor circuit
• ECM software or hardware problems

BMW DTC P0549 seriousness

DTC P0549 should not be ignored as it can lead to poor engine performance and potential damage if left unresolved. It is recommended to address this issue promptly to prevent further complications.

How to diagnose DTC P0549 on BMW

To diagnose DTC P0549 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors related to the Bank 2 Sensor 1 EGT sensor
3. Test the EGT sensor for proper resistance and voltage readings
4. Check for any exhaust leaks or other related issues

How to fix DTC P0549 on BMW

To fix DTC P0549 on a BMW, you can try the following:

1. Replace the faulty Exhaust Gas Temperature (EGT) Sensor
2. Repair any damaged wiring or connectors in the EGT sensor circuit
3. Clear the fault code and perform a test drive to ensure the issue is resolved

How to erase DTC P0549 on BMW

To erase DTC P0549 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. After clearing the code, it is recommended to perform a test drive to verify that the issue has been successfully resolved.

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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