Engine-Codes - Chevrolet - P0AA4 CHEVROLET

P0AA4 CHEVROLET Code - Hybrid/EV Battery Negative Contactor Circuit Stuck Closed

- Code Popularity: 818 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the P0AA4 CHEVROLET Code?

  • Faulty Battery Energy Control Module
  • Battery Energy Control Module harness is open or shorted
  • Battery Energy Control Module circuit poor electrical connection

|How to Fix the P0AA4 CHEVROLET 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 P0AA4 CHEVROLET code?

Labor: 1.0

The cost to diagnose the P0AA4 CHEVROLET 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.

|What are P0AA4 CHEVROLET code possible symptoms?

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

|What Does the P0AA4 CHEVROLET Code Mean?

The hybrid/EV battery contains 4 high voltage contactors and 1 solid state relay (transistor). The high voltage contactors and transistor allow the high voltage DC batteries to be connected to the vehicle or contain the high voltage DC within the hybrid/EV battery assembly. The 4 high voltage contactors consist of a main positive high voltage contactor, main negative high voltage contactor, charge positive high voltage contactor and a precharge negative high voltage contactor. The transistor controls the battery heater high voltage positive circuit. The contactors and transistor close and open in a specific sequence controlled by the hybrid/EV powertrain control module 2. The hybrid/EV powertrain control module 2 supplies voltage to the control circuit for each high voltage contactor/transistor. Ground is provided through a vehicle ground external of the high voltage battery.

Hybrid/EV Battery Negative Contactor Circuit Stuck Closed

|Need more information with the P0AA4 CHEVROLET code?

Need more information on how to fix the P0AA4 CHEVROLET code?
Get Access to Factory Service Manuals

|Need help with a P0AA4 CHEVROLET code?

Get the P0aa4 Chevrolet code diagnosed by a professional: Find a repair shop in your area