P0A92 on Toyota
Hybrid Generator Performance
P0A92 on Toyota vehicles indicates hybrid generator performance. Au7o has documented this code across 1 Toyota model — most commonly on Prius. The hybrid generator (motor-generator) is not performing as expected — output does not match command. Affects engine starting and HV battery charging. Typical repair costs on Toyota range from $1,200 to $4,000, depending on the specific model and root cause.
Common Causes of P0A92
- •Failing generator
- •Inverter/power-electronics issue
- •Resolver/current sensor fault
- •Wiring or cooling problem
P0A92 on Toyota by Model
Toyota Prius(1 issue)
- Hybrid Transaxle Motor-Generator Bearing Whine and Transaxle Failure2004-2015
High-mileage Prius eCVT transaxles develop a speed-dependent whine or groan from failing MG1/MG2 support bearings and worn reduction gears; in the worst cases metal debris or a motor-generator fault trips the hybrid system with codes such as P0A92, P0A7A or an isolation fault (P0AA6). The noise typically starts as a faint metallic whine that rises with road speed - not engine speed - and gets progressively louder over thousands of miles. Because Toyota does not sell MG1/MG2 bearings, windings or gears separately, there is no small repair once a bearing is gone.
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View P0A92 across all makes →Frequently Asked Questions
What does P0A92 mean on Toyota?▼
P0A92 stands for "Hybrid Generator Performance." The hybrid generator (motor-generator) is not performing as expected — output does not match command. Affects engine starting and HV battery charging. On Toyota specifically, this code is documented across 1 model.
What causes P0A92 on Toyota vehicles?▼
Common causes on Toyota: Failing generator, Inverter/power-electronics issue, Resolver/current sensor fault, Wiring or cooling problem. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0A92 on a Toyota?▼
Repair costs on Toyota range from $1,200 to $4,000, depending on the specific model and root cause.
Which Toyota models have P0A92 documented?▼
Au7o has documented P0A92 on 1 Toyota model: Prius.