What are the common causes of P0B1F?

A sensor D that reads off from actual pack voltage. Corrosion in the voltage sense D connector. High resistance in the voltage sense D circuit. A battery pack voltage outside the expected range.

Compare sense D to actual pack voltage on a scan tool. Measure the sense D voltage against pack voltage. Check the sense D circuit for high resistance. Inspect the sense D connector for corrosion. Replace the sense D sensor if it reads off spec. Clear the code and retest.

P0B1F

Hybrid/EV Battery Pack Voltage Sense D Circuit Range/Performance

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

What it means

P0B1F means Hybrid/EV Battery Pack Voltage Sense D Circuit Range/Performance.

Check these first

A sensor D that reads off from actual pack voltage
Corrosion in the voltage sense D connector
High resistance in the voltage sense D circuit
A battery pack voltage outside the expected range

What to do next

Compare sense D to actual pack voltage on a scan tool
Measure the sense D voltage against pack voltage
Check the sense D circuit for high resistance
Inspect the sense D connector for corrosion
Replace the sense D sensor if it reads off spec
Clear the code and retest

Look up another code

Code or symptom

Enter a full code or a symptom. Press / to search. How to read a code

Type a code above, or start from a symptom or a common code.

Updated

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