Diagnostics P3000
Diagnostic codeP3000
P3000: Hybrid Battery Control System
P3000 is a generic 'something in the hybrid battery control system is wrong' code. Almost always paired with a more specific sub-code that tells you what.
What it means
P3000 by itself doesn't tell you much. It's the parent code that pairs with sub-codes (P3011, P3012, P3013… up through P3030), each of which points to a specific cell block inside the battery pack that's gone weak.
Vehicles where we see this most
- Toyota Prius (all generations)
- Toyota Camry Hybrid
- Toyota Highlander Hybrid
- Lexus RX400h / RX450h
Most-likely causes
- A specific cell block has dropped below threshold (the sub-code tells you which one).
- Multiple weak blocks aging at different rates. A sign the whole pack is going.
- Less commonly: a wiring or sensor fault inside the battery housing.
Is it really the battery?
Almost always yes. P3011–P3030 sub-codes are literal cell-block addresses inside the pack. If you've got any of those, the pack itself is the issue.
What to do next
- Get the FULL code list. P3000 alone isn't enough. The sub-codes are what tell us which block.
- Photograph all codes and bring them when you call. We can usually quote you over the phone with the year, mileage, and full code list.
- If only one block is weak, a reconditioned pack is usually the right call. If most blocks are reading low, consider new OEM (lifetime warranty) instead.
Take the quiz
Not sure if this is what's wrong with your car?
Five questions, built by our techs. We'll tell you honestly whether it sounds like the pack, or something cheaper.