P0BA6 code meaning
Hybrid/EV Battery Voltage Sense V Circuit Low
Powertrain system Generic code P0Bxx codes Check engine light
What P0BA6 means
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.
P0BA6 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0BA6
- MIL and service hybrid or EV system message
- Power limited, restart may be refused
Common causes of P0BA6
- Most likelySense lead V shorted to ground or a lower cell
- PossibleMonitoring board input for channel V failed
- Less likelyCell V genuinely collapsed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery voltage sense vWiring harnessBms
What each part of P0BA6 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| B | Area: hybrid propulsion. |
| A6 | The exact fault in that area. |
What to do next
- Note P0BA6 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0BA6
What does P0BA6 mean?
P0BA6 means "Hybrid/EV Battery Voltage Sense V Circuit Low". A sense V reading that collapses towards zero produces P0BA6. It is a generic code, so it means the same on every make.
Is it safe to drive with P0BA6?
Drive gently and only to a workshop. With P0BA6 the car can go into limp mode (reduced power) to protect itself.
Will P0BA6 fail an emissions test?
Yes, it can. P0BA6 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0BA6 to fix?
Difficulty: workshop only. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0BA6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.