P0B81
Hybrid/EV Battery Voltage Sense O Circuit
P0B81 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Voltage Sense O Circuit. Common causes: open or short circuit in the sensor circuit, battery voltage sensor fault. Estimated repair cost: $33–167.
Symptoms
- Check Engine light comes on
- The car goes into emergency mode
- Reduced engine power
- Unusual battery level readings
- Problems charging the hybrid battery
Causes
- Open or short circuit in the sensor circuit
- Battery voltage sensor fault
- Poor contact in connectors
- Wiring harness damage
- Problems with the battery management module
How to Fix
- Check the continuity of the voltage sensor circuit
- Inspect connectors and connections for corrosion
- Check the functionality of the voltage sensor
- Scan the battery management module for additional errors
- If necessary, replace the battery voltage sensor
Related codes
Error P0B81 by Vehicle Brand
FAQ
What does the P0B81 code mean?
P0B81 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Voltage Sense O Circuit
What causes a P0B81 error code?
The most common causes of P0B81 include: Open or short circuit in the sensor circuit; Battery voltage sensor fault; Poor contact in connectors; Wiring harness damage.
How do I fix a P0B81 diagnostic trouble code?
To fix P0B81: Check the continuity of the voltage sensor circuit. Inspect connectors and connections for corrosion. Check the functionality of the voltage sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0B81?
Limited driving only, diagnose soon
How much does it cost to fix P0B81?
The estimated repair cost for P0B81 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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