P0B13 code meaning
Hybrid/EV Battery Pack Current Sensor A/B Correlation
Powertrain system Generic code P0Bxx codes Check engine light
What P0B13 means
P0B13 compares the two pack current readings, sensor A and sensor B, and sets when they disagree. On the Chevrolet Volt GM pairs a coarse and a fine channel: the code fails when they differ by more than 10 A while both read between -20 and 20 A, for example 10 s within a 12.5 s window (2016) or 400 of 500 samples at 25 ms (2019), Type A, one trip. Bulletins show P0B13 on the GM Lyriq, Hummer EV and BrightDrop Zevo after suspect public chargers, and on the Audi Q5 PHEV and e-tron GT, where software of the battery controller caused it. Single-sensor faults use P0ABF to P0AC3 and P0B0E to P0B12. The driver sees a high-voltage warning and reduced power.
P0B13 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0B13
- MIL and hybrid/EV system warning on
- Red battery or Service High Voltage message, request to stop safely
- Battery power limited, reduced electric drive or assist
- Charging interrupted or refused
Common causes of P0B13
- Most likelyBattery controller software fault, fixed by update (Audi, GM)
- PossibleDisturbance from an external charging station during charging
- PossibleOffset drift of one of the two current channels
- Less likelyInternal communication fault between switching unit and current sensor
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 aHv battery pack current sensor bBms
What each part of P0B13 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. |
| 13 | The exact fault in that area. |
What to do next
- Note P0B13 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 P0B13
What does P0B13 mean?
P0B13 means "Hybrid/EV Battery Pack Current Sensor A/B Correlation". P0B13 compares the two pack current readings, sensor A and sensor B, and sets when they disagree. It is a generic code, so it means the same on every make.
Is it safe to drive with P0B13?
Drive gently and only to a workshop. With P0B13 the car can go into limp mode (reduced power) to protect itself.
Will P0B13 fail an emissions test?
Yes, it can. P0B13 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 P0B13 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P0B13 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.