P0A2C Possible Causes
- Faulty hybrid vehicle engine
- Hybrid vehicle engine wiring harness open or shorted
- Poor electrical connection in hybrid vehicle engine circuit
What Does It Mean?
How to Fix P0A2C Code
Check the “possible causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0A2C Possible Symptoms
Check engine light illuminated (or service engine soon warning light)
P0A2C Meaning
The thermistor resistance, which is enclosed in engine temperature sensor No. 1, changes according to engine temperature changes. The lower the engine temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. Engine temperature sensor No. 1 is connected to the HV control ECU. The 5V power supply voltage is provided from the HV control ECU MMT terminal to engine temperature sensor No. 1 via resistor R.
Since resistor R and engine temperature sensor No. 1 are connected in series, the resistance changes with engine temperature changes, which also causes the voltage across MMT to change. Based on this signal, the HV control ECU limits the load to prevent engine overheating. Additionally, the HV control ECU checks engine temperature sensor No. 1 for wiring malfunction and the sensor for malfunction.