What are the common causes of P0B4E?

A loose or corroded voltage sense D connector. Chafed wiring in the voltage sense D circuit. A battery pack cell going weak. Electrical interference on the sense D signal.

Road test and watch battery pack voltage sense D data. Wiggle test the sense D connector and wiring. Test the battery pack cells for a weak cell. Check for sources of electrical interference. Replace the sense D sensor if the signal drops. Clear the code and retest.

P0B4E

Hybrid/EV Battery Voltage Sense D Circuit Intermittent/Erratic

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Hybrid Propulsion

What it means

P0B4E means Hybrid/EV Battery Voltage Sense D Circuit Intermittent/Erratic.

Check these first

A loose or corroded voltage sense D connector
Chafed wiring in the voltage sense D circuit
A battery pack cell going weak
Electrical interference on the sense D signal

What to do next

Road test and watch battery pack voltage sense D data
Wiggle test the sense D connector and wiring
Test the battery pack cells for a weak cell
Check for sources of electrical interference
Replace the sense D sensor if the signal drops
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.