P2479 – BMW DTC

BMW DTC P2479 – Exhaust Gas Temperature Out of Range (Bank 1 Sensor 2)

DTC P2479 meaning on BMW

The Diagnostic Trouble Code (DTC) P2479 for BMW indicates that the Exhaust Gas Temperature (EGT) sensor located after the catalytic converter on Bank 1 is reporting a temperature reading that is out of the expected range. This sensor is responsible for monitoring the exhaust gas temperature to ensure the proper functioning of the emissions system.

BMW DTC P2479 symptoms

Symptoms of DTC P2479 on a BMW may include:

• Illuminated Check Engine Light
• Reduced engine performance
• Increased fuel consumption
• Potential rough idling or misfiring

BMW DTC P2479 causes

Common causes of DTC P2479 on a BMW include:

• Failed or faulty Exhaust Gas Temperature (EGT) sensor
• Wiring or connector issues in the EGT sensor circuit
• Exhaust leaks near the EGT sensor
• Problems with the catalytic converter

BMW DTC P2479 seriousness

While DTC P2479 may not always result in immediate drivability issues, it is important to address this code promptly to prevent potential damage to the emissions system and ensure optimal engine performance. Ignoring this code could lead to increased emissions, reduced fuel efficiency, and potential long-term engine damage.

How to diagnose DTC P2479 on BMW

To diagnose DTC P2479 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes and confirm the presence of P2479.
2. Inspect the wiring and connectors related to the Bank 1 Sensor 2 EGT sensor for any visible damage or corrosion.
3. Check for exhaust leaks near the EGT sensor location.
4. Test the EGT sensor using a multimeter to verify its functionality.

How to fix DTC P2479 on BMW

To fix DTC P2479 on a BMW, you can consider the following actions:

1. Replace the Bank 1 Sensor 2 Exhaust Gas Temperature (EGT) sensor if it is found to be faulty.
2. Repair any damaged wiring or connectors in the EGT sensor circuit.
3. Address any exhaust leaks near the EGT sensor location.
4. If necessary, replace the catalytic converter if it is determined to be the root cause of the issue.

How to erase DTC P2479 on BMW

To erase DTC P2479 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s Engine Control Module (ECM). After addressing the underlying issue causing the fault code, clearing the code will reset the Check Engine Light and allow the system to monitor 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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