P0B43 – BMW DTC

BMW DTC P0B43 – Hybrid/EV Battery Voltage Sense ‘B’ Circuit High

DTC P0B43 meaning on BMW

The Diagnostic Trouble Code (DTC) P0B43 for BMW indicates an issue with the Hybrid/EV Battery Voltage Sense ‘B’ Circuit registering a high voltage reading. This code is specific to hybrid or electric vehicles and is related to the monitoring of the battery voltage levels.

BMW DTC P0B43 symptoms

Symptoms associated with the BMW DTC P0B43 may include:

• Check Engine Light (MIL) illuminated
• Reduced hybrid system performance
• Decreased fuel efficiency
• Possible inability to start the vehicle

BMW DTC P0B43 causes

Common causes of the BMW DTC P0B43 may include:

• High voltage in the Hybrid/EV Battery Voltage Sense ‘B’ Circuit
• Issues with the battery voltage sensor
• Wiring or connection problems in the circuit

BMW DTC P0B43 seriousness

The seriousness of the BMW DTC P0B43 code lies in the potential impact on the hybrid or electric vehicle’s performance and efficiency. Ignoring this code can lead to further damage to the vehicle’s electrical system and may result in drivability issues.

How to diagnose DTC P0B43 on BMW

To diagnose the DTC P0B43 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the specific fault code
2. Inspect the Hybrid/EV Battery Voltage Sense ‘B’ Circuit for any visible damage or loose connections
3. Test the battery voltage sensor for proper operation
4. Check the battery voltage levels to ensure they are within the specified range

How to fix DTC P0B43 on BMW

Fixing the BMW DTC P0B43 code may involve the following actions:

1. Repair or replace any damaged wiring or connections in the Hybrid/EV Battery Voltage Sense ‘B’ Circuit
2. Replace the battery voltage sensor if it is found to be faulty
3. Reset the fault codes and monitor the system for any reoccurrence

How to erase DTC P0B43 on BMW

To erase the DTC P0B43 on a BMW, the following steps can be taken:

1. Use a diagnostic scanner to clear the fault codes from the vehicle’s memory
2. Ensure that the underlying issue causing the fault code has been addressed
3. Perform a test drive to confirm that the code does not return

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.