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Toyota P0A81 Code – Hybrid Battery Cell Imbalance
Limited
Safe to drive :
Toyota hybrid vehicles only
Applies only to :
Not applicable to :
This explanation does NOT apply to other brands.
Medium
Severity level :
When Does This Code Appear on the Vehicles
P0A81 occurs when hybrid battery cell imbalance is detected.
What This Code means on the Vehicles
Indicates a cell within battery pack is underperforming or failing.
Why This is different from a generic OBD2 Code
Generic scanners cannot detect individual module imbalance.
Common Situations That Trigger This Code
Cell aging; Thermal stress; Manufacturing variance.
What Will NOT Fix This Code
Replacing inverter; Ignoring cell imbalance.
How to Clear This Code on Vehicles
Measure cell voltages; replace defective cells; clear code with Techstream.
Related Manufacturer Specific Codes
Toyota P0A80; Toyota P0A82
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