P0B10 code meaning
Hybrid/EV Battery Pack Current Sensor B Circuit Low
Powertrain system Generic code P0Bxx codes Check engine light
What P0B10 means
P0B10 means the output of current sensor B lies below its valid range. GM uses a dual-range Hall sensor whose channel B covers small currents with high resolution: the 2019 battery energy control module table sets P0B10 when this fine current reads below -24 A (ADC count under 82) for 1.6 s within a 2 s window, Type A, one trip; the 2011 Volt table uses -23 A for 175 ms within 250 ms, one trip. Toyota reports P0B10 for the 2020-25 RAV4 Hybrid when the inverse channel IB1 voltage is excessively low (internal code P0B0E11), one trip, MIL on immediately. A short to ground or a lost sensor supply is typical. The high-side code is P0B11.
P0B10 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0B10
- MIL and hybrid system warning on
- Battery charge and discharge power limited
- Engine runs more often, fuel use rises
Common causes of P0B10
- Most likelySensor B signal line shorted to ground
- Possible5 V supply of the current sensor missing
- PossibleCurrent sensor or junction block with integrated sensor defective
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery pack current sensor bWiring harnessBms
What each part of P0B10 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| B | Area: hybrid propulsion. |
| 10 | The exact fault in that area. |
What to do next
- Note P0B10 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0B10
What does P0B10 mean?
P0B10 means "Hybrid/EV Battery Pack Current Sensor B Circuit Low". P0B10 means the output of current sensor B lies below its valid range. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B10?
Drive gently and only to a workshop. With P0B10 the car can go into limp mode (reduced power) to protect itself.
Will P0B10 fail an emissions test?
Yes, it can. P0B10 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0B10 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0B10 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.