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P0AE3 Buick Code - Hybrid/EV Battery Precharge Contactor Circuit Stuck Open

- Code Popularity: 674 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By AutoCodes.com - Updated Apr 27, 2020
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|Code P0AE3 Buick Possible Causes

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

|How do I Fix the Code P0AE3 Buick?

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's pins.

Does your Buick have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code P0AE3 Buick?

Labor: 1.0

The cost of diagnosing the P0AE3 Buick code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code P0AE3 Buick Possible Symptoms?

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

|Code P0AE3 Buick Description

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.

OBDII Code P0AE3 Buick - Hybrid/EV Battery Precharge Contactor Circuit Stuck Open - AutoCodes.com
P0AE3 Buick Code - Hybrid/EV Battery Precharge Contactor Circuit Stuck Open

|Need More Information on the P0AE3 Buick Code?

Need more information on how to fix the P0AE3 Buick code? Get Access to Factory Service Manuals

|Need Help with the P0AE3 Buick Code?

Get the P0AE3 Buick code diagnosed by a professional: Find a repair shop in your area

|Code P0AE3 Buick comments

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