P0B99
Hybrid/EV Battery Voltage Sense S Circuit Intermittent/Erratic
P0B99 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Voltage Sense S Circuit Intermittent/Erratic. Common causes: damaged or corroded sensor connectors, open or short circuit in wiring. Estimated repair cost: $33–167.
Symptoms
- Check Engine light comes on
- Reduced vehicle power
- Switching to emergency mode
- Unstable operation of the hybrid system
- Battery charging problems
Causes
- Damaged or corroded sensor connectors
- Open or short circuit in wiring
- Battery voltage sensor fault
- Problems with the hybrid system control module
- Poor circuit grounding
How to Fix
- Check the integrity and cleanliness of the sensor connectors
- Test wiring for opens and short circuits
- Check the resistance and signal of the voltage sensor
- Inspect the hybrid system control module for damage.
- Repair only from an authorized dealer
Related codes
Error P0B99 by Vehicle Brand
FAQ
What does the P0B99 code mean?
P0B99 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Voltage Sense S Circuit Intermittent/Erratic
What causes a P0B99 error code?
The most common causes of P0B99 include: Damaged or corroded sensor connectors; Open or short circuit in wiring; Battery voltage sensor fault; Problems with the hybrid system control module.
How do I fix a P0B99 diagnostic trouble code?
To fix P0B99: Check the integrity and cleanliness of the sensor connectors. Test wiring for opens and short circuits. Check the resistance and signal of the voltage sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0B99?
Do not drive — repair immediately
How much does it cost to fix P0B99?
The estimated repair cost for P0B99 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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