P0C7D Possible Causes
- Faulty hybrid battery thermistor
- Faulty battery smart unit
- Hybrid battery thermistor harness is open or shorted
- Poor electrical connection in hybrid battery thermistor circuit
What Does It Mean?
How to Fix Code P0C7D
Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
P0C7D Possible Symptoms
Check engine light illuminated (or service engine soon warning light)
P0C7D Meaning
Battery temperature sensors are provided at 3 locations in the HV battery. The resistance of the thermistor, built into each battery temperature sensor, varies with changes in HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery smart unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on this detection result, the power management control ECU controls the radiator fan. (The radiator fan starts when the HV battery temperature exceeds a predetermined level.)