P0CA9

Hybrid/EV Battery Temperature Sensor M Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine light comes on
Reduced performance of the hybrid system
Reducing the range of an electric vehicle
System transition to emergency mode
Incorrect battery temperature readings

Causes

Battery temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in connectors
Problems with the battery management module
Contact corrosion

How to Fix

Check the continuity of the temperature sensor circuit
Inspect connectors and contacts for damage
Check the resistance of the temperature sensor
Replace faulty temperature sensor
Test the battery management module

Related codes

P0CA8 P0CAA P0CAB