P0C46

Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit Intermittent/Erratic

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Hybrid/electric system power reduction
Increased fuel consumption (for hybrids)
Check Engine Light or Battery Warning Light Is On
Unstable operation of the battery cooling system
Vehicle power limitation

Causes

Battery coolant temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Wiring harness damage
Problems with the battery management module

How to Fix

Check the condition of the battery coolant temperature sensor
Check the integrity of the sensor circuit and connectors
Check the sensor resistance and compare with standardized values
If necessary, replace the temperature sensor
Check the operation of the battery cooling system after repair

Related codes

P0C47 P0C48 P0C49