P0C81

Hybrid/EV Battery Temperature Sensor H Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Reducing electric range
Battery overheating in severe cases
Activation of emergency operation

Causes

Open or short circuit in the sensor circuit
Temperature sensor fault H
Poor contact in the sensor connector
Corroded contacts or damaged wiring
Problems in the battery management module

How to Fix

Check the integrity of the sensor circuit
Test the resistance of the temperature sensor
Inspect connectors and wiring harness for damage
If necessary, replace the temperature sensor
Check and reflash the battery management module

Related codes

P0C80 P0C82 P0AFA