P0C43

Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine light comes on
Reduced performance of the hybrid system
Battery overheating
Reducing the range of an electric vehicle
Incorrect coolant temperature readings

Causes

Coolant temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor connection or corroded connectors
Problems with the hybrid system control module
Low coolant level

How to Fix

Check the level and condition of the coolant
Check the integrity of the sensor circuit and connection
Test the coolant temperature sensor
Replace the faulty sensor if necessary
Reset the error code and check the system

Related codes

P0C44 P0C45 P0C46