P0ABBHybrid/EV Battery Pack Voltage Sense A Circuit Range/Performance
- 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
- P0ABB is a plausibility check: the measured pack voltage is within electrical limits but does not agree with what the individual cells add up to. GM documents it in several hybrid tables. From 2016 the battery controller flags it when pack voltage and the sum of cell voltages differ by more than 10 V in 32 of 40 samples; the 2013 table compares the pack reading with 32 times the average cell voltage and uses a 5.49 V limit. Both are Type B, so the MIL needs two trips. The check is suppressed while cell voltage circuit faults are active. P0ABC and P0ABD cover hard low or high readings, P0AF8 compares the pack sensor with the inverter bus voltage.
- What you may notice
- Check engine or hybrid system warning light
- Erratic state-of-charge display
- Reduced electric power
- Likely causes
- LikelyPack voltage measurement drifted (divider or input aging)
- PossibleFaulty cell voltage tap distorting the cell sum
- PossibleHigh-resistance busbar or sense connection
- 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 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.