P1B97 – BMW DTC

BMW DTC P1B97 – Hybrid/EV Battery Voltage Sense ‘B’ Circuit Voltage Implausible High

DTC P1B97 meaning on BMW

DTC P1B97 on a BMW indicates an issue with the Hybrid/EV Battery Voltage Sense ‘B’ Circuit Voltage being implausibly high. This fault code is specific to hybrid and electric vehicles and relates to the voltage sensing circuitry of the high-voltage battery system.

BMW DTC P1B97 symptoms

Symptoms of DTC P1B97 on a BMW may include:

• Check Engine Light (MIL) illuminated
• Hybrid/EV system warning light on
• Reduced hybrid/EV system performance
• Possible inability to start the vehicle

BMW DTC P1B97 causes

Common causes of DTC P1B97 on a BMW include:

• High-voltage battery voltage sensor malfunction
• Wiring or connection issues in the voltage sensing circuit
• Faulty hybrid/EV battery control module
• Software glitches in the hybrid/EV system

BMW DTC P1B97 seriousness

The seriousness of DTC P1B97 on a BMW should not be underestimated, as it directly relates to the high-voltage battery system of the vehicle. Ignoring this fault code can lead to further damage to the hybrid/EV components and potentially unsafe driving conditions.

How to diagnose DTC P1B97 on BMW

To diagnose DTC P1B97 on a BMW, a comprehensive diagnostic scan tool capable of reading hybrid/EV system codes is required. The following steps can help in the diagnosis:

1. Retrieve the DTC P1B97 code and any accompanying codes
2. Inspect the high-voltage battery voltage sensor and its wiring for damage or corrosion
3. Check the hybrid/EV battery control module for proper operation
4. Perform a system reset and recheck for the fault code

How to fix DTC P1B97 on BMW

Fixing DTC P1B97 on a BMW may involve the following steps:

1. Repair or replace the high-voltage battery voltage sensor if faulty
2. Address any wiring or connection issues in the voltage sensing circuit
3. Update the software of the hybrid/EV system to the latest version
4. If necessary, replace the hybrid/EV battery control module

How to erase DTC P1B97 on BMW

To erase DTC P1B97 on a BMW, follow these steps:

1. Use a diagnostic scan tool to clear the fault code
2. Perform a system reset to ensure the fault code does not reappear
3. Verify that the Check Engine Light is no longer illuminated

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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