BMW DTC P2245 – O2 Sensor Reference Voltage Circuit Low (Bank 1 Sensor 1)
DTC P2245 meaning on BMW
The Diagnostic Trouble Code (DTC) P2245 for BMW refers to the O2 Sensor Reference Voltage Circuit Low for Bank 1 Sensor 1. This code indicates that the voltage signal being received from the oxygen sensor located in the exhaust system before the catalytic converter is lower than the expected reference voltage.
BMW DTC P2245 symptoms
Symptoms of DTC P2245 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 P2245 causes
Common causes of DTC P2245 on a BMW include:
- Faulty oxygen sensor (Bank 1 Sensor 1)
- Wiring or connector issues in the O2 sensor circuit
- Exhaust system leaks
- ECU (Engine Control Unit) software issues
BMW DTC P2245 seriousness
While DTC P2245 may not cause immediate drivability issues, it is important to address this code promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance and fuel efficiency.
How to diagnose DTC P2245 on BMW
To diagnose DTC P2245 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 related to the Bank 1 Sensor 1 oxygen sensor
- Check for exhaust leaks near the oxygen sensor
- Perform a voltage test on the O2 sensor reference circuit
How to fix DTC P2245 on BMW
To fix DTC P2245 on a BMW, you can try the following:
- Replace the Bank 1 Sensor 1 oxygen sensor if faulty
- Repair any damaged wiring or connectors in the O2 sensor circuit
- Address any exhaust leaks near the oxygen sensor
- Update the ECU software if necessary
How to erase DTC P2245 on BMW
To erase DTC P2245 on a BMW, you can use an OBD-II scanner to clear the fault code after addressing the underlying issue causing the code. Once the repair has been completed, you can reset the Check Engine Light and erase the DTC from the vehicle’s memory.
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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