P0AF1

Drive Motor Inverter Temperature Sensor A Circuit Intermittent/Erratic

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced motor power
Inverter overheating
Incorrect operation of the cooling system
Intermittent operation of the hybrid system

Causes

Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Temperature sensor malfunction
Wiring harness damage
Problems with the inverter control unit

How to Fix

Check the integrity of wiring and connectors
Test the resistance of the temperature sensor
Check the sensor signal using an oscilloscope
Replace faulty temperature sensor
Update the firmware of the inverter control unit

Related codes

P0AF0 P0AF2 P0AF3