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

Quick Answer

The hybrid/EV battery contains 4 high voltage contactors and 1 solid state relay (transistor). Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0AE3 Saturn indicates Hybrid/EV Battery Precharge Contactor Circuit Stuck Open.
Common causes
Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 794
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Apr 27, 2020
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Code P0AE3 Saturn 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 Saturn - Hybrid/EV Battery Precharge Contactor Circuit Stuck Open - AutoCodes.com
P0AE3 Saturn Code - Hybrid/EV Battery Precharge Contactor Circuit Stuck Open
What does this mean?

What are the Possible Causes of the DTC P0AE3 Saturn?

  • 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 DTC P0AE3 Saturn?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0AE3 Saturn code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0AE3 Saturn code?

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

Need Help with the Code?

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

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0AE3 Saturn Code

1. What does the OBDII code P0AE3 mean for a Saturn?

P0AE3 indicates that the hybrid/EV battery precharge contactor circuit is stuck open, preventing proper high-voltage system operation.

2. What are the common symptoms of code P0AE3 in a Saturn?

Symptoms include warning lights on the dashboard, reduced hybrid/EV performance, inability to start the vehicle, or limited power mode.

3. What causes the P0AE3 code to appear?

Common causes include a faulty precharge contactor, damaged wiring or connectors in the circuit, or issues with the battery control module.

4. Can I drive my Saturn with a P0AE3 code?

It is not recommended to drive the vehicle, as the precharge system ensures safe operation of the high-voltage battery. Driving could cause further damage or safety risks.

5. How is the P0AE3 code diagnosed?

A technician will use a scan tool to verify the code, inspect the precharge contactor, check wiring and connections, and test the battery control module.

6. What repairs can fix the P0AE3 code?

Repairs may include replacing the precharge contactor, repairing or replacing damaged wiring, or reprogramming or replacing the battery control module.

7. Is the P0AE3 code specific to Saturn hybrid or EV models?

Yes, this code typically applies to Saturn hybrid or electric vehicles equipped with high-voltage battery systems.

8. How much does it cost to fix the P0AE3 code?

The repair cost depends on the issue, but replacing the precharge contactor can range from $300 to $800, while module repairs or programming may cost more.

9. What tools are needed to troubleshoot the P0AE3 code?

Diagnostic tools include an OBDII scan tool, multimeter for testing circuits, and potentially manufacturer-specific software for module diagnostics.

10. Can the P0AE3 code be cleared without repairs?

Clearing the code without addressing the root cause is not recommended, as the issue will likely recur and potentially create safety concerns.

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