BMW DTC P242E – Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic (Bank 1 Sensor 3)
DTC P242E meaning on BMW
The Diagnostic Trouble Code (DTC) P242E for BMW indicates an issue with the Exhaust Gas Temperature (EGT) Sensor Circuit on Bank 1 Sensor 3. This code specifically points to an intermittent or erratic signal from the EGT sensor, which is responsible for monitoring the exhaust gas temperature in the vehicle’s exhaust system.
BMW DTC P242E symptoms
Symptoms associated with DTC P242E on a BMW may include:
- Check Engine Light (MIL) illuminated on the dashboard
- Decreased fuel efficiency
- Engine running rough or misfiring
- Reduced engine performance
BMW DTC P242E causes
The common causes of DTC P242E on a BMW include:
- Faulty Exhaust Gas Temperature (EGT) Sensor
- Wiring or connector issues in the EGT sensor circuit
- Exhaust system leaks or damage
- Software or calibration issues
BMW DTC P242E seriousness
While DTC P242E may not cause immediate drivability issues, it is important to address this fault promptly. Ignoring this code can lead to potential long-term damage to the engine or emissions system, affecting the vehicle’s performance and fuel efficiency.
How to diagnose DTC P242E on BMW
To diagnose DTC P242E on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the EGT sensor and its wiring for any visible damage or corrosion
- Perform a resistance test on the EGT sensor to check for proper functionality
- Check for exhaust leaks or other issues in the exhaust system
How to fix DTC P242E on BMW
To fix DTC P242E on a BMW, you can consider the following actions:
- Replace the faulty Exhaust Gas Temperature (EGT) Sensor
- Repair or replace any damaged wiring or connectors in the EGT sensor circuit
- Address any exhaust system leaks or damage
- Perform a software update or calibration if necessary
How to erase DTC P242E on BMW
To erase DTC P242E on a BMW, you can clear the fault code using a diagnostic scanner or by disconnecting the vehicle’s battery for a few minutes. However, it is recommended to address the underlying issue causing the fault code before clearing it to prevent it from reoccurring.
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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