P0ABC code meaning
Hybrid/EV Battery Pack Voltage Sense A Circuit Low
Powertrain system Generic code P0Axx codes Check engine light
What P0ABC means
P0ABC is stored when the pack voltage sensor reports a value below anything the battery could really have, pointing to a short to ground or a lost sense signal rather than a discharged pack. GM's 2016 and 2019 hybrid tables set it below 4.8 V with system voltage above 10.2 V, after 8 failed samples out of 10 taken every 25 ms, and rate it Type A with MIL on the first trip. The 2013 table for an earlier hybrid uses a limit of 30 V, 7 of 10 samples and Type B. A real deep discharge is handled by other codes such as P0AFA. Because the controller no longer trusts pack voltage, hybrid operation is restricted or the vehicle will not go ready.
P0ABC at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0ABC
- Hybrid system or check engine warning on
- Vehicle may refuse to enter ready mode
- Engine runs continuously, no electric drive
Common causes of P0ABC
- Most likelySense line shorted to ground or disconnected
- PossibleSense fuse or link open so no voltage reaches the input
- Less likelyBattery controller measurement input defective
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery pack voltage sense aWiring harnessBms
What each part of P0ABC means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| A | Area: hybrid propulsion. |
| BC | The exact fault in that area. |
What to do next
- Note P0ABC 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 P0ABC
What does P0ABC mean?
P0ABC means "Hybrid/EV Battery Pack Voltage Sense A Circuit Low". P0ABC is stored when the pack voltage sensor reports a value below anything the battery could really have, pointing to a short to ground or a lost sense signal rather than a discharged pack. It is a generic code, so it means the same on every make.
Is it safe to drive with P0ABC?
Drive gently and only to a workshop. With P0ABC the car can go into limp mode (reduced power) to protect itself.
Will P0ABC fail an emissions test?
Yes, it can. P0ABC 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 P0ABC to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0ABC clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.