AutoCodes – Chevrolet – P0AE7 Chevrolet

P0AE7 Chevrolet Code - Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage

Quick Answer

The hybrid battery system voltage is controlled by two high voltage contactors. Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator 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: P0AE7 Chevrolet indicates Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage.
Common causes: Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator 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 744

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0AE7 Chevrolet Description

The hybrid battery system voltage is controlled by two high voltage contactors. The high voltage contactors allow the high voltage DC batteries to be connected to the vehicle or safely contain the high voltage DC within the Hybrid/EV Battery Pack assembly. Of the two contactors, one is a pre-charge contactor and the other is the primary contactor. The two contactors are closed in a specific sequence by the Starter/Generator Control Module. The pre-charge contactor is closed first. This causes high voltage to flow through the pre-charge resistor, allowing system voltage to build slowly. Once the system voltage has raised and stabilized, the primary contactor is closed. Both contactors are controlled by the Starter/Generator Control Module. The Starter/Generator Control Module supplies B+ to each contactor at all times. When the contactors are to be closed, the Starter/Generator Control Module will provide a ground to the contactor through a low side driver.

OBDII Code P0AE7 Chevrolet - Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage - AutoCodes.com — P0AE7 Chevrolet Code - Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0AE7 Chevrolet?

Faulty Starter/Generator Control Module
Starter/Generator Control Module harness is open or shorted
Starter/Generator Control Module circuit poor electrical connection

How to Fix the DTC P0AE7 Chevrolet?

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 P0AE7 Chevrolet 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.

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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 P0AE7 Chevrolet Code

1. What does the OBDII code P0AE7 mean on a Chevrolet?

P0AE7 indicates an issue with the Hybrid/EV battery precharge contactor control circuit, where the voltage is detected to be higher than expected.

2. What are the common symptoms of the P0AE7 code?

Symptoms may include a check engine light, reduced hybrid or EV performance, the vehicle failing to start, or limited acceleration.

3. What causes the P0AE7 code to appear?

Possible causes include a faulty precharge contactor, a damaged control circuit, wiring issues, or a malfunctioning battery control module.

4. Can I drive my Chevrolet with the P0AE7 code?

It is not recommended to drive the vehicle, as this code can lead to reduced power or even cause the vehicle to stop functioning entirely.

5. How is the P0AE7 code diagnosed?

A technician will use a scan tool to read the code, inspect the precharge contactor and control circuit, test the high-voltage battery, and check for wiring or connector damage.

6. What repairs are needed to fix the P0AE7 code?

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

7. How much does it cost to fix the P0AE7 code?

Repair costs can vary but typically range from $200 to $1,000, depending on whether the issue is with wiring, the contactor, or the battery control module.

8. Can a dead 12V battery trigger the P0AE7 code?

While a dead 12V battery is not a direct cause of this code, it can lead to system malfunctions that may interfere with hybrid/EV components.

9. Does the P0AE7 code always require battery replacement?

No, the issue is often related to the precharge contactor or control circuit. Battery replacement is only necessary if the high-voltage battery itself is faulty.

10. Can clearing the P0AE7 code solve the issue?

Clearing the code without addressing the underlying problem will not fix the issue, and the code is likely to return. Proper diagnosis and repair are needed.