Engine-Codes - Toyota - P0A9C Toyota

P0A9C Toyota Code - Hybrid Battery Temperature Sensor 'A' Range/Performance

- Code Popularity: 3,369 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code P0A9C Toyota?

  • Faulty HV Battery Assembly (HV battery temperature sensor)
  • HV Battery Assembly harness is open or shorted
  • HV Battery Assembly circuit poor electrical connection
  • Faulty Battery smart unit

|How to Fix the P0A9C Toyota Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the Cost to Diagnose the Code P0A9C Toyota?

Labor: 1.0

The cost to diagnose the P0A9C Toyota code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Does your Toyota have Safety Recalls? → Check here

|What are Code P0A9C Toyota Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0A9C Toyota Code Mean?

The battery temperature sensors are provided at 3 locations of the HV battery. The resistance of the thermistor, which is built into each battery temperature sensor, varies in accordance with changes in the 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 the HV battery temperature, and sends the detected value to the power management control ECU. Based on the results of this detection, the power management control ECU controls the blower fan. (The blower fan starts when HV battery temperature rises above a predetermined level.)

P0A9C Toyota Code - Hybrid Battery Temperature Sensor 'A' Range/Performance

|Need more Information on the P0A9C Toyota Code?

Need more information on how to fix the P0A9C Toyota code? Get Access to Factory Service Manuals

|Need Help with the P0A9C Toyota Code?

Get the P0A9C Toyota code diagnosed by a professional: Find a repair shop in your area