P0B13Hybrid/EV Battery Pack Current Sensor A/B Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- 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
- Likely causes
- 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
- RareInternal communication fault between switching unit and current sensor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.