P0CF1

Hybrid/EV Electronics Coolant Temperature Sensor A Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Hybrid system power reduction
Activation of emergency operation
Overheat warning indication
Reduced electronics cooling efficiency
Check Engine Light Illuminates

Causes

Open circuit in the temperature sensor circuit
Short circuit to power in wiring harness
Coolant temperature sensor malfunction
Connector problems or contact corrosion
Hybrid ECU malfunction

How to Fix

Check the continuity of the temperature sensor circuit
Inspect connectors and contacts for corrosion
Check the resistance of the temperature sensor
Replace the faulty temperature sensor if necessary
Check the functionality of the hybrid system ECU

Related codes

P0CF2 P0CF0 P0A90