What are the common causes of P0B68?

Corroded or damaged wiring in the voltage sense J circuit. A failed voltage sensor on circuit J. Battery voltage out of range from overcharge, undercharge, or wear. Electrical interference on the sense J circuit. Hybrid control calibration off for circuit J.

Inspect sense J wiring and connectors. Read sense J voltage live and compare to spec. Test the voltage sensor on circuit J. Check battery voltage and charging parameters. Update or recalibrate the hybrid control software. Clear the code and retest.

P0B68

Hybrid/EV Battery Voltage Sense J Circuit

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

What it means

P0B68 means Hybrid/EV Battery Voltage Sense J Circuit.

Check these first

Corroded or damaged wiring in the voltage sense J circuit
A failed voltage sensor on circuit J
Battery voltage out of range from overcharge, undercharge, or wear
Electrical interference on the sense J circuit
Hybrid control calibration off for circuit J

What to do next

Inspect sense J wiring and connectors
Read sense J voltage live and compare to spec
Test the voltage sensor on circuit J
Check battery voltage and charging parameters
Update or recalibrate the hybrid control software
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.