Hybrid Battery Voltage Specifications Explained
A technical guide to hybrid battery voltage for Phoenix drivers.
Module-Level Voltage
Each NiMH battery module in a Toyota or Lexus hybrid produces approximately 7.2V nominal. A healthy module should read between 7.0V and 7.4V at rest. When modules drop below 6.5V, DTC codes like P3011–P3024 begin appearing.
- Single module nominal: 7.2V DC
- Single module charged: ~8.4V DC
- Single module minimum: 6.0V DC
Pack-Level Voltage
The total pack voltage depends on the number of modules:
- 28-cell pack (Prius): 201.6V nominal, ~235V fully charged
- 34-cell pack (Camry/Avalon/Lexus): 244.8V nominal, ~285V fully charged
Voltage and DTC Codes
When module voltages diverge significantly, the hybrid ECU triggers codes. P0A80 indicates overall pack failure, while P3011–P3024 identify specific weak blocks. In Phoenix heat, voltage divergence accelerates, making regular scanning important.
Schedule Voltage Diagnosis
Hybrid Matters offers mobile voltage testing and battery replacement across Phoenix. 28-cell from $800, 34-cell from $1,000. Call (602) 845-9291 or book online.
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