P0ABFHybrid/EV Battery Pack Current Sensor A Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The pack current sensor, usually a Hall-effect unit around the main cable, tells the battery controller how much current flows in and out. P0ABF is the general fault of sensor A. GM uses it in its 2019 hybrid controller tables as a stuck-in-range check: before the high-voltage bus is precharged the controller stores a zero-current baseline, then expects a measurable change once precharge starts or the main contactor closes and loads such as the inverter and auxiliary power module draw current. If the reading moves by less than 1 A, P0ABF fails. Out-of-range readings are P0AC1 and P0AC2, offset errors P0AC0. Without a valid current value state of charge cannot be tracked, so power is limited.
- What you may notice
- Hybrid system or check engine warning on
- Reduced electric power and erratic charge display
- Vehicle may not go ready
- Likely causes
- LikelyHall current sensor output frozen
- PossibleSensor supply, ground or signal wire faulty
- RareSensor not seated around the conductor after repair
- 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: €200 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.