BMW DTC P2246 – O2 Sensor Reference Voltage Circuit High (Bank 1 Sensor 1)
DTC P2246 meaning on BMW
The Diagnostic Trouble Code (DTC) P2246 for BMW indicates an issue with the O2 Sensor Reference Voltage Circuit High for Bank 1 Sensor 1. This means that the voltage signal being received from the oxygen sensor located in the exhaust system before the catalytic converter on the bank 1 side is higher than the expected reference voltage.
BMW DTC P2246 symptoms
Symptoms of DTC P2246 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 P2246 causes
Common causes of DTC P2246 on a BMW include:
- Faulty O2 sensor
- Wiring or connector issues in the O2 sensor circuit
- Exhaust system leaks
- Engine running rich or lean
BMW DTC P2246 seriousness
While DTC P2246 may not cause immediate drivability issues, it is important to address this problem promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance and fuel efficiency.
How to diagnose DTC P2246 on BMW
To diagnose DTC P2246 on a BMW, you can follow these steps:
- Use an OBD-II scanner to retrieve the fault code and freeze frame data
- Inspect the wiring and connectors in the O2 sensor circuit for any damage or corrosion
- Check the O2 sensor for proper operation and voltage output
- Perform a visual inspection of the exhaust system for leaks or damage
How to fix DTC P2246 on BMW
To fix DTC P2246 on a BMW, you can try the following solutions:
- Replace the faulty O2 sensor
- Repair or replace any damaged wiring or connectors in the O2 sensor circuit
- Fix any exhaust leaks or issues in the system
- Address any underlying engine running rich or lean conditions
How to erase DTC P2246 on BMW
To erase DTC P2246 on a BMW, you can use an OBD-II scanner to clear the fault code after the underlying issue has been resolved. This will reset the Check Engine Light and turn off the MIL on the dashboard.
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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