P242B – BMW DTC

BMW DTC P242B – Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 3)

DTC P242B meaning on BMW

DTC P242B indicates a problem with the Exhaust Gas Temperature (EGT) Sensor Circuit for Bank 1 Sensor 3 in a BMW vehicle. This fault code is related to the performance or range of the sensor, suggesting that the signal being received is outside the expected parameters.

BMW DTC P242B symptoms

Symptoms of DTC P242B in a BMW may include:

• Check Engine Light illuminated on the dashboard
• Reduced engine performance
• Increased fuel consumption
• Possible rough idling or misfiring

BMW DTC P242B causes

Common causes of DTC P242B in a BMW include:

• Defective Exhaust Gas Temperature Sensor
• Wiring or connector issues in the sensor circuit
• Exhaust system leaks or damage
• Software or calibration issues

BMW DTC P242B seriousness

While DTC P242B may not cause immediate drivability issues, it is important to address this fault code promptly. Ignoring the problem can lead to decreased engine efficiency, potential damage to the catalytic converter, and increased emissions.

How to diagnose DTC P242B on BMW

To diagnose DTC P242B 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 EGT sensor and its wiring for any visible damage or corrosion
3. Perform a resistance test on the sensor to check for proper functionality
4. Check for exhaust leaks or other issues in the exhaust system

How to fix DTC P242B on BMW

To fix DTC P242B on a BMW, you may need to:

1. Replace the Exhaust Gas Temperature Sensor (Bank 1 Sensor 3)
2. Repair any damaged wiring or connectors in the sensor circuit
3. Address any exhaust system leaks or damage
4. Perform a software update or calibration if necessary

How to erase DTC P242B on BMW

To erase DTC P242B on a BMW, you can:

1. Use a diagnostic scanner to clear the fault code
2. After making the necessary repairs, reset the Check Engine Light
3. Perform a test drive to ensure the fault code does not return

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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