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P0B74 – BMW DTC

BMW DTC P0B74 – Hybrid/EV Battery Voltage Sense ‘L’ Circuit Low

DTC P0B74 meaning on BMW

DTC P0B74 on a BMW indicates an issue with the Hybrid/EV Battery Voltage Sense ‘L’ Circuit being detected as low. This fault code is specific to the hybrid or electric vehicle system of the BMW.

BMW DTC P0B74 symptoms

Symptoms of DTC P0B74 on a BMW may include:

  • Check Engine Light (MIL) illuminated
  • Hybrid/EV system warning light on
  • Reduced hybrid or electric drive performance

BMW DTC P0B74 causes

Common causes of DTC P0B74 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 P0B74 seriousness

The seriousness of DTC P0B74 on a BMW lies in the potential impact on the hybrid or electric drive system. Ignoring this fault code can lead to reduced efficiency or performance of the hybrid or electric components.

How to diagnose DTC P0B74 on BMW

To diagnose DTC P0B74 on a BMW, you can follow these steps:

  1. Use a diagnostic scanner to retrieve the fault code and related data
  2. Inspect the hybrid/EV battery voltage sensor and its wiring for any visible damage
  3. Check the hybrid/EV battery pack for any issues

How to fix DTC P0B74 on BMW

To fix DTC P0B74 on a BMW, you may need to:

  1. Replace the faulty hybrid/EV battery voltage sensor
  2. Repair any damaged wiring or connections in the voltage sense circuit
  3. Address any issues with the hybrid/EV battery pack

How to erase DTC P0B74 on BMW

To erase DTC P0B74 on a BMW, you can:

  1. Use a diagnostic scanner to clear the fault code after the repair
  2. Ensure that the issue causing the fault code has been resolved

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

← All BMW Diagnostic Trouble Codes

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