P0A94 on Toyota Vehicles: DC/DC Converter Performance
A hybrid voltage converter isn't delivering the voltage it should – on Toyotas, the boost converter. P0A94 →
9Complaints mentioning the code
#1Rank among 2 brands
1.0%Share of Toyota DTC complaints
In NHTSA owner complaints we analyzed for Toyota, P0A94 was mentioned 9 times.
Notes by brand
On the 3rd-generation Prius, Toyota reprogrammed the hybrid software in a widely publicized recall because transistors in the boost converter could overheat and fail, setting codes such as P0A94 and shutting the car down. If you own one, confirm the recall work was done; failed inverters were replaced under that campaign.
Most mentioned models
| Toyota Prius Plug-In | 4 | |
|---|---|---|
| Toyota Prius | 3 | |
| Toyota Prius C | 2 |
Model years mentioned
Components named in these complaints
- Electrical System (5)
- Fuel/propulsion System (3)
- Engine (3)
- Unknown Or Other (3)
- Power Train (2)
Possible causes
- Boost converter overheated because the inverter cooling pump or coolant failed
- Internal boost converter failure: power transistor, reactor or voltage sensor inside the inverter
- Weak high-voltage battery whose voltage collapses under load
- 12 V DC/DC converter not holding charging voltage (on makes that use the code this way)
Related codes
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.