Engine-Codes - Generic - P0AA8

P0AA8 - Hybrid Battery Voltage Isolation Sensor Circuit Range/Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0AA8 Possible Causes

  • Hybrid battery junction block
  • Faulty Battery Smart Unit
  • Faulty HV Battery
  • Inverter With Converter Assembly

How is the P0AA8 code repair?

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 P0AA8 code

Labor: 1.0

The cost to diagnose the P0AA8 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

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

P0AA8 Meaning

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

More Information

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Information for specific makes

  • P0AA8 BUICK Hybrid/EV Battery Voltage Isolation Sensing Performance
  • P0AA8 CADILLAC Hybrid/EV Battery Voltage Isolation Sensing Performance
  • P0AA8 CHEVROLET Hybrid/EV Battery Voltage Isolation Sensing Performance
  • P0AA8 GMC Hybrid/EV Battery Voltage Isolation Sensing Performance
  • P0AA8 LEXUS Hybrid Battery Voltage Isolation Sensor Circuit Range/Performance
  • P0AA8 NISSAN Hybrid Battery Voltage Isolation Sensor Circuit Range/Performance
  • P0AA8 TOYOTA Hybrid Battery Voltage Isolation Sensor Circuit Range/Performance

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