P0A9D

Hybrid/EV Battery Temperature Sensor A Circuit Low

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Hybrid system power reduction
Check Engine Light Illuminates
Switching to emergency mode
Reduced battery efficiency
Incorrect battery temperature readings on the dashboard

Causes

Open or short circuit in the sensor circuit
Poor contact in connectors
Battery temperature sensor malfunction
Wiring harness damage
Problems with the hybrid system controller

How to Fix

Check the continuity of the temperature sensor circuit
Inspect and clean connector contacts
Test the temperature sensor with a multimeter
Check resistance and voltage in the circuit
Replace temperature sensor if necessary

Related codes

P0A9E P0A9F P0A9C