BMW DTC P0B91 – Hybrid/EV Battery Voltage Sense ‘R’ Circuit Range/Performance
DTC P0B91 meaning on BMW
DTC P0B91 on a BMW indicates an issue with the Hybrid/EV Battery Voltage Sense ‘R’ Circuit Range/Performance. This fault code is specific to the hybrid or electric vehicle system of the BMW.
BMW DTC P0B91 symptoms
Symptoms of DTC P0B91 on a BMW may include:
- Check Engine Light illuminated
- Hybrid or electric drive system not functioning properly
- Reduced fuel efficiency
- Possible drivability issues
BMW DTC P0B91 causes
Common causes of DTC P0B91 on a BMW include:
- Faulty hybrid/EV battery voltage sensor
- Wiring or connection issues in the voltage sense circuit
- Hybrid/EV battery pack issues
BMW DTC P0B91 seriousness
The seriousness of DTC P0B91 on a BMW depends on the underlying cause. Ignoring this fault code can lead to further damage to the hybrid or electric drive system, potentially resulting in drivability issues and reduced fuel efficiency.
How to diagnose DTC P0B91 on BMW
To diagnose DTC P0B91 on a BMW, you can:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the hybrid/EV battery voltage sensor and its wiring for any visible damage
- Perform voltage tests on the sensor and circuit to check for proper operation
How to fix DTC P0B91 on BMW
To fix DTC P0B91 on a BMW, you may need to:
- Replace the faulty hybrid/EV battery voltage sensor
- Repair any damaged wiring or connections in the voltage sense circuit
- Address any issues with the hybrid/EV battery pack if necessary
How to erase DTC P0B91 on BMW
To erase DTC P0B91 on a BMW, you can:
- Use a diagnostic scanner to clear the fault code after the repair has been completed
- Ensure that the underlying issue causing the fault code has been resolved before clearing it
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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