P242A – BMW DTC

BMW DTC P242A – Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 3)

DTC P242A meaning on BMW

DTC P242A indicates a fault with the Exhaust Gas Temperature (EGT) Sensor Circuit for Bank 1 Sensor 3 in a BMW vehicle. This fault code is specific to the EGT sensor located after the catalytic converter on bank 1 of the engine.

BMW DTC P242A symptoms

Symptoms of DTC P242A in a BMW may include:

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

BMW DTC P242A causes

Common causes of DTC P242A in a BMW include:

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

BMW DTC P242A seriousness

While DTC P242A may not always result in immediate drivability issues, it is important to address this fault code promptly. Ignoring this fault can lead to potential engine damage or increased emissions.

How to diagnose DTC P242A on BMW

To diagnose DTC P242A on a BMW, 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 EGT sensor to check for proper functionality
4. Check for exhaust leaks or other issues in the exhaust system

How to fix DTC P242A on BMW

To fix DTC P242A on a BMW, consider the following steps:

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

How to erase DTC P242A on BMW

To erase DTC P242A on a BMW, use a diagnostic scanner to clear the fault code from the vehicle’s memory. After fixing the underlying issue, ensure that the Check Engine Light does not reappear.

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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