P0A02 Possible Causes
- Faulty engine coolant temperature sensor
- Engine electronics – Coolant temperature sensor harness open or short circuit
- Engine electronics – Coolant temperature sensor circuit poor electrical connection
What Does It Mean?
First Diagnose P0A02 Code
Check the “possible causes” listed above. Visually inspect the related cable harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0A02 Possible Symptoms
Engine light on (or service engine soon warning light)
P0A02 Description
The Power Management Control Electronic Control Unit (ECU) detects the HV coolant temperature using the coolant temperature sensor integrated in the inverter with converter. The Power Management Control ECU uses the coolant temperature sensor signals to verify the effectiveness of the inverter cooling system. If necessary, the Power Management Control ECU will limit the inverter output to prevent inverter overheating. The Power Management Control ECU also detects sensor malfunctions based on HV coolant temperature sensor values. The inverter with converter assembly detects malfunctions in the HV coolant temperature sensor and its wiring.