MajorCommonElectrical

Toyota Voxy: High-Voltage Hybrid Battery Pack Degradation (P3000)

High-Voltage Hybrid Battery Pack Degradation (P3000) is a common electrical fault on the Toyota Voxy on the 2014 onward cars, and we rate it major. Putting it right costs $3,000 to $8,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 32 documented faults on the Toyota Voxy.

Vehicle: Toyota Voxy
Years: 2014 onward
Fuel: hybrid
Gearbox: cvt
System: Electrical

This page covers the Toyota Voxy as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Toyota Voxy faults32 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph for this fault yet. We would rather show none than show a picture of something else.

What goes wrong

The nickel-metal hydride high-voltage battery pack (OEM #G9510-28070 on ZWR80) loses cell capacity over time and through thermal cycling, triggering diagnostic trouble code P3000 (Battery Control System fault). As individual cells weaken or fail, the battery management system reduces available power and fuel economy deteriorates markedly. On higher-mileage examples the system may enter a reduced-power limp mode or refuse to start the hybrid drive.

What you would notice

Persistent P3000 or P3011–P3019 battery fault codes on OBD scan
Fuel economy noticeably worse than rated 23–26 km/L combined
Hybrid battery gauge swings rapidly or shows perpetually low charge
EV-only mode unavailable at low urban speeds
Triangle warning lamp and master warning illuminate on dash

How to check it

Where to look. Under rear passenger seat (HV battery pack); cooling fan intake on rear cabin floor

Request a hybrid battery state-of-health scan showing individual cell voltages and capacity percentage.
On a test drive, watch for the hybrid battery gauge cycling rapidly between full and empty, or the combustion engine failing to shut off at low speeds where EV-only mode should engage.
Check the battery cooling fan behind the rear seat for dust blockage.

What it costs to put right

$3,000 to $8,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has the high-voltage battery ever been replaced or reconditioned, and is there documentation?”
“Has the vehicle had a hybrid system health check at a Toyota dealer or hybrid specialist recently?”
“Is the battery cooling fan cleaned regularly, and has it ever been replaced?”

Now check the Toyota Voxy you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Toyota Voxy buyer questions

Is high-voltage hybrid battery pack degradation (p3000) serious on a Toyota Voxy?

We rate it major and common on the Toyota Voxy. The nickel-metal hydride high-voltage battery pack (OEM #G9510-28070 on ZWR80) loses cell capacity over time and through thermal cycling, triggering diagnostic trouble code P3000 (Battery Control System fault). As individual cells weaken or fail, the battery management system reduces available power and fuel economy deteriorates markedly. On higher-mileage examples the system may enter a reduced-power limp mode or refuse to start the hybrid drive.

How much does it cost to fix on a Toyota Voxy?

$3,000 to $8,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Toyota Voxy years are affected?

Our research records this fault on the 2014 onward Toyota Voxy. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Request a hybrid battery state-of-health scan showing individual cell voltages and capacity percentage. On a test drive, watch for the hybrid battery gauge cycling rapidly between full and empty, or the combustion engine failing to shut off at low speeds where EV-only mode should engage. Check the battery cooling fan behind the rear seat for dust blockage. Look here: Under rear passenger seat (HV battery pack); cooling fan intake on rear cabin floor