P0ABAHybrid/EV Battery Pack Voltage Sense 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 battery management system measures the total voltage of the high-voltage pack through a dedicated sense circuit and uses it for state of charge, power limits and contactor checks. P0ABA is the general circuit fault for sense circuit A, set when the reading is unusable without being clearly low, high or erratic. No manufacturer documents this exact code publicly; GM, for instance, monitors the same circuit with the more specific P0ABB to P0ABD. CARB requires hybrid battery inputs that feed emission-relevant control to be checked for circuit faults. Expect a warning light and reduced hybrid assistance, because the controller then works with conservative limits.
- What you may notice
- Check engine or hybrid system warning light
- Reduced electric assist or EV range
- Vehicle may not enter ready mode
- Likely causes
- LikelyDamaged or loose voltage sense lead inside the battery pack
- PossibleMeasurement input of the battery controller defective
- RareBlown sense fuse or failed divider resistor
- 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: €150 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.