What are the common causes of P0B94?

An R circuit connector losing contact on rough roads. A chafed R sense lead rubbing a pack bracket. An R tap that opens once the pack warms up. Moisture tracking across the R connector. A loose R terminal at the sense module.

Road test and graph the R circuit voltage. Wiggle test the R harness and connector. Inspect the R sense lead for chafing. Measure R circuit resistance while flexing the harness. Replace the R sense lead if the signal cuts out. Clear the code and retest.

P0B94

Hybrid/EV Battery Voltage Sense R Circuit Intermittent/Erratic

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

What it means

P0B94 means Hybrid/EV Battery Voltage Sense R Circuit Intermittent/Erratic.

Check these first

An R circuit connector losing contact on rough roads
A chafed R sense lead rubbing a pack bracket
An R tap that opens once the pack warms up
Moisture tracking across the R connector
A loose R terminal at the sense module

What to do next

Road test and graph the R circuit voltage
Wiggle test the R harness and connector
Inspect the R sense lead for chafing
Measure R circuit resistance while flexing the harness
Replace the R sense lead if the signal cuts out
Clear the code and retest

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Updated

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