P0ABC: Hybrid/EV Battery Pack Voltage Sense A Circuit Low
What to do
Zero or absurdly low pack voltage on the scan is this code's signature — a measurement fault, not a battery verdict.
What this code means
The pack voltage sense circuit reads at the bottom of its range — the broken-sense-wire presentation P0ABA warns about, reading as a dead battery on a car that is not dead. Wiring first.
Likely causes
Start here
- Open circuit in sensor wiring · moderate
- Wiring shorted to ground · moderate
- Corroded or loose connector · easy
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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