OBD
P0B48
Hybrid/EV Battery Voltage Sense C Circuit High
What it means
P0B48 means Hybrid/EV Battery Voltage Sense C Circuit High.
Check these first
- High voltage on the sense C circuit
- A short in the sense C wiring or connectors
- A faulty voltage sensor on circuit C
- Corrosion or water in the sense C connections
- The battery installed incorrectly
What to do next
- Read sense C voltage live and compare to spec
- Inspect sense C wiring for shorts or damage
- Test the voltage sensor on circuit C
- Clean and dry any corroded sense C connections
- Verify battery installation
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.