P0CEF

Hybrid/EV Electronics Coolant Temperature Sensor A Circuit Range/Perfomance

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
Incorrect coolant temperature readings
Overheating of electronic components
Activation of emergency operation

Causes

Faulty coolant temperature sensor
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with the control unit
Sensor is dirty or damaged

How to Fix

Check the condition of the coolant temperature sensor
Check the continuity and resistance of the sensor circuit
Inspect connectors and contacts for corrosion or damage
If necessary, replace the temperature sensor
Reset the error code and check the system operation

Related codes

P0CF0 P0CF1 P0AFA