What are the common causes of P0B55?

A sensor F that reads off from actual pack voltage. Corrosion in the voltage sense F connector. High resistance in the voltage sense F circuit. Water in the voltage sense F connector.

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

P0B55

Hybrid/EV Battery Voltage Sense F Circuit Range/Performance

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

What it means

P0B55 means Hybrid/EV Battery Voltage Sense F Circuit Range/Performance.

Check these first

A sensor F that reads off from actual pack voltage
Corrosion in the voltage sense F connector
High resistance in the voltage sense F circuit
Water in the voltage sense F connector

What to do next

Compare sense F to actual pack voltage on a scan tool
Measure the sense F voltage against pack voltage
Check the sense F circuit for high resistance
Inspect the sense F connector for water or corrosion
Replace the sense F 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.