BMW DTC P2242 – O2 Sensor Positive Current Control Circuit High (Bank 2 Sensor 1)
DTC P2242 meaning on BMW
The DTC P2242 code on a BMW indicates an issue with the O2 Sensor Positive Current Control Circuit High for Bank 2 Sensor 1. This means that the oxygen sensor located in the exhaust system before the catalytic converter on the side of the engine containing cylinder 2 is reporting a higher than expected voltage signal to the engine control module (ECM).
BMW DTC P2242 symptoms
Symptoms of a DTC P2242 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Decreased fuel efficiency
- Engine running rough or misfiring
- Reduced engine performance
BMW DTC P2242 causes
The common causes of a DTC P2242 on a BMW include:
- Faulty O2 sensor Bank 2 Sensor 1
- Wiring or connector issues in the O2 sensor circuit
- Exhaust leaks near the O2 sensor
- ECM software issues
BMW DTC P2242 seriousness
While a DTC P2242 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and potentially harm the catalytic converter over time if left unresolved. It is recommended to address this issue promptly to prevent further damage to the vehicle.
How to diagnose DTC P2242 on BMW
To diagnose a DTC P2242 on a BMW, you can follow these steps:
- Use an OBD-II scanner to retrieve the fault code and verify the code P2242.
- Inspect the wiring and connectors of the Bank 2 Sensor 1 O2 sensor for any visible damage or corrosion.
- Perform a visual inspection of the exhaust system for leaks near the O2 sensor.
- If necessary, use a multimeter to test the O2 sensor’s voltage output and resistance.
How to fix DTC P2242 on BMW
To fix a DTC P2242 on a BMW, you can try the following solutions:
- Replace the Bank 2 Sensor 1 O2 sensor if it is faulty.
- Repair any damaged wiring or connectors in the O2 sensor circuit.
- Fix any exhaust leaks near the O2 sensor.
- If needed, update the ECM software to the latest version.
How to erase DTC P2242 on BMW
To erase a DTC P2242 on a BMW, you can clear the fault code using an OBD-II scanner. After addressing the underlying issue causing the fault code, you can reset the ECM by clearing the code. Ensure that the problem has been resolved before clearing the code 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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.