P0B85
Hybrid/EV Battery Voltage Sense O Circuit Intermittent/Erratic
P0B85 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Voltage Sense O Circuit Intermittent/Erratic. Common causes: poor contact in the voltage measurement circuit connectors, wiring harness damage. Estimated repair cost: $17–89.
Symptoms
- Unstable operation of the hybrid system
- Reduced vehicle power
- Check Engine Light Illuminated
- Switching to emergency mode
- Inaccurate battery level readings
Causes
- Poor contact in the voltage measurement circuit connectors
- Wiring harness damage
- Battery voltage sensor fault
- Problems with the Battery Management Module (BMS)
- Contact corrosion
How to Fix
- Check the integrity of the wiring harness and connectors
- Clean contacts from corrosion
- Check the operation of the voltage sensor
- Test the Battery Management Module (BMS)
- Replace damaged components
Related codes
Error P0B85 by Vehicle Brand
FAQ
What does the P0B85 code mean?
P0B85 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Voltage Sense O Circuit Intermittent/Erratic
What causes a P0B85 error code?
The most common causes of P0B85 include: Poor contact in the voltage measurement circuit connectors; Wiring harness damage; Battery voltage sensor fault; Problems with the Battery Management Module (BMS).
How do I fix a P0B85 diagnostic trouble code?
To fix P0B85: Check the integrity of the wiring harness and connectors. Clean contacts from corrosion. Check the operation of the voltage sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0B85?
Limited driving only, diagnose soon
How much does it cost to fix P0B85?
The estimated repair cost for P0B85 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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