P0A9E

Hybrid/EV Battery Temperature Sensor A Circuit High

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 the range of an electric vehicle
Incorrect battery temperature readings
Activation of emergency operation

Causes

Faulty battery temperature sensor
Open or short circuit in the sensor circuit
Poor contact in circuit connectors
Wiring harness damage
Battery management module malfunction

How to Fix

Check the continuity of the temperature sensor circuit
Measure sensor resistance
Check connectors and connections for corrosion
Replace faulty temperature sensor
Test the battery management module

Related codes

P0A9F P0AA0 P0AA1