P0BA7Hybrid/EV Battery Voltage Sense V Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0BA7 is the high-voltage plausibility code for channel V. The battery controller compares the measured value against a ceiling no healthy cell should reach: 4.8 V for 1.4 s within 2 s in GM's 2016 Volt and ELR and in the 2019 battery energy control module (Type A), 4.90 V in 14 of 18 samples of 100 ms in the 16OBDG02 programme (Type A), and 4.65 V in 7 of 10 samples in the eAssist mild hybrid (Type B). Each of these checks waits for the open sense line monitor to pass. A high reading usually comes from a sense lead V pressed against a higher cell tab or busbar, or from a measuring chip that has lost its reference, and only rarely from a cell actually overcharged.
- What you may notice
- MIL and hybrid or EV warning
- Charging and regeneration reduced
- Likely causes
- LikelySense lead V touching a higher cell tab or busbar
- PossibleMeasuring chip with faulty reference reading channel V high
- RareCell V really overcharged
- 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: €100 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.