P242D – BMW DTC

BMW DTC P242D – Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 3)

DTC P242D meaning on BMW

DTC P242D indicates a high circuit condition in the exhaust gas temperature sensor for Bank 1 Sensor 3 on a BMW vehicle. This fault code is specific to the exhaust gas temperature sensor located after the catalytic converter on the bank 1 side of the engine.

BMW DTC P242D symptoms

Symptoms of DTC P242D on a BMW may include:

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

BMW DTC P242D causes

The common causes of DTC P242D on a BMW include:

• Faulty exhaust gas temperature sensor
• Wiring or connector issues in the sensor circuit
• Exhaust system leaks or damage
• Software or calibration issues

BMW DTC P242D seriousness

While DTC P242D may not cause immediate drivability issues, it is important to address this fault code promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance and emissions control.

How to diagnose DTC P242D on BMW

To diagnose DTC P242D on a BMW, 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 exhaust gas temperature sensor
3. Check the sensor’s resistance and compare it to specifications
4. Perform a visual inspection of the exhaust system for leaks or damage

How to fix DTC P242D on BMW

To fix DTC P242D on a BMW, consider the following:

1. Replace the faulty exhaust gas temperature sensor
2. Repair any damaged wiring or connectors in the sensor circuit
3. Address any exhaust system leaks or damage
4. Update software or perform calibration if necessary

How to erase DTC P242D on BMW

To erase DTC P242D on a BMW, use a diagnostic scanner to clear the fault code after the underlying issue has been resolved. This will reset the Check Engine Light and ensure the fault code does not reappear if the problem has been successfully fixed.

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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