P0BA6Hybrid/EV Battery Voltage Sense V Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- A sense V reading that collapses towards zero produces P0BA6. The threshold depends on the system: GM's eAssist mild hybrid uses under 1.4 V in 7 of 10 samples with at least 8.8 V on the 12 V side, Type B, while GM's lithium-ion battery controllers of 2016 and 2019 go down to 0.2 V or less for 1.4 s within 2 s, Type A. The 16OBDG02 programme sets it below 0.20 V in 14 of 18 samples. Because these tests are blocked by an active open sense line fault, P0BA4 would be reported first if the lead were simply broken; P0BA6 alone tends to mean a short to a lower potential or a failed input. The driver sees a hybrid or EV warning and reduced power.
- What you may notice
- MIL and service hybrid or EV system message
- Power limited, restart may be refused
- Likely causes
- LikelySense lead V shorted to ground or a lower cell
- PossibleMonitoring board input for channel V failed
- RareCell V genuinely collapsed
- 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.