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Home >> Toyota >> 2025 >> Prius Plug-In Hybrid SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Hybrid Battery System (HEV) - Diagnostic Codes (1 Of 2)) >> HYBRID BATTERY SYSTEM (for M20A-FXS) >> DTC P0A81-96: Hybrid/EV Battery Cooling Fan 1 Component Internal Failure; DTC P0A81-98: Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature [12/2022 - ] >> Description

DTC P0A81-96: Hybrid/EV Battery Cooling Fan 1 Component Internal Failure; DTC P0A81-98: Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature [12/2022 - ]: Description

WARNING: This page is about a different variant/trim than selected.

Refer to the description for DTC P0A81-11.

Refer to DESCRIPTION 

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate DTC Output from Priority Note
P0A81-96 Hybrid/EV Battery Cooling Fan 1 Component Internal Failure The battery cooling blower assembly is malfunctioning and the actual speed is not within the specified range of the target speed calculated by the ECU.*
*: This DTC is not stored when "Hybrid/EV Battery Cooling Fan 1 Frequency" is excessively low or high.
(2 trip detection logic)
  • Wire harness or connector
  • Battery cooling blower assembly
  • Battery ECU assembly
  • No. 1 HV battery intake filter
  • No. 1 hybrid battery intake duct
Comes on Master Warning:
Comes on
HV Battery A SAE Code: P0A82
P0A81-98 Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature The HV battery temperature is high and the battery cooling blower assembly is malfunctioning and the actual speed is not within the specified range of the target speed calculated by the ECU.*
*: This DTC is not stored when "Hybrid/EV Battery Cooling Fan 1 Frequency" is excessively low or high.
(1 trip detection logic)
  • Wire harness or connector
  • Battery cooling blower assembly
  • Battery ECU assembly
  • No. 1 HV battery intake filter
  • No. 1 hybrid battery intake duct
Comes on Master Warning:
Comes on
HV Battery A SAE Code: P0A82

HINT: 

"Hybrid/EV Battery Cooling Fan 1 Frequency" is detected when the battery cooling blower assembly is operating and its value changes in proportion to the battery cooling blower assembly rotation speed.