Engine-Codes - Generic - P0AA9

P0AA9 Code - Hybrid Battery Voltage Isolation Sensor Circuit Low

- Code Popularity: 2,395 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
ChatAC AutoCodes.com AI Chat

What are the Possible Causes of the DTC P0AA9?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Hybrid battery junction block
  • Faulty Battery Smart Unit
  • Faulty HV Battery
  • Inverter With Converter Assembly
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC P0AA9?

Check 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 pins.

Search for P0AA9 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0AA9 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the P0AA9 Code Mean?

The power management control ECU monitors the battery smart unit and detects insulation malfunctions in the high-voltage system.

P0AA9 Code - Hybrid Battery Voltage Isolation Sensor Circuit Low

Need more Information on the Code?

Need more information on how to fix the P0AA9 code? Get Access to Factory Service Manuals

Code P0AA9 Information for Specific Makes

  • P0AA9 Buick Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 Low Voltage
  • P0AA9 Cadillac Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 Low Voltage
  • P0AA9 Chevrolet Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 Low Voltage
  • P0AA9 GMC Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 Low Voltage
  • P0AA9 Lexus Hybrid Battery Voltage Isolation Sensor Circuit Low
  • P0AA9 Nissan Hybrid Battery Voltage Isolation Sensor Circuit Low
  • P0AA9 Toyota Hybrid Battery Voltage Isolation Sensor Circuit Low

Need Help with the Code?

Get the P0AA9 code diagnosed by a professional: Find a repair shop in your area