AutoCodes – Cadillac – P0AE6 Cadillac

P0AE6 Cadillac Code - Hybrid/EV Battery Precharge Contactor Control Circuit Low 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: P0AE6 Cadillac indicates Hybrid/EV Battery Precharge Contactor Control Circuit Low 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 604

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 P0AE6 Cadillac 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 P0AE6 Cadillac - Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage - AutoCodes.com — P0AE6 Cadillac Code - Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0AE6 Cadillac?

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 P0AE6 Cadillac?

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 P0AE6 Cadillac 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 P0AE6 Cadillac Code

1. What does OBDII code P0AE6 mean on a Cadillac?

Code P0AE6 indicates a problem with the Hybrid/EV battery precharge contactor control circuit, specifically detecting low voltage.

2. What are common symptoms of code P0AE6?

Symptoms may include a check engine light, reduced hybrid/electric vehicle performance, limited driving range, or the vehicle failing to start.

3. What causes code P0AE6 on a Cadillac?

Common causes include a faulty precharge relay, damaged wiring or connectors in the circuit, a malfunctioning battery control module, or low voltage from the hybrid/EV battery.

4. Can I drive my Cadillac with code P0AE6?

Driving with this code is not recommended, as it can lead to further damage or leave you stranded if the hybrid/EV system fails completely.

5. How is code P0AE6 diagnosed?

A technician will inspect the precharge circuit for wiring or connector issues, test the precharge relay, and check for proper voltage from the hybrid/EV battery.

6. How do you fix code P0AE6 on a Cadillac?

Repairs may involve replacing the precharge relay, repairing damaged wiring, or reprogramming or replacing the battery control module if itâ€™s defective.

7. Could a low voltage hybrid/EV battery trigger code P0AE6?

Yes, insufficient voltage from the hybrid/EV battery can cause the precharge contactor control circuit to malfunction and trigger this code.

8. Is code P0AE6 specific to Cadillacs?

No, while it is common on Cadillac hybrid/EV models, this code can appear on other vehicles with hybrid/EV systems using similar technology.

9. What tools are needed to troubleshoot code P0AE6?

Youâ€™ll need an OBDII scanner capable of reading hybrid/EV codes, a multimeter to check voltages, and possibly manufacturer-specific diagnostic tools.

10. How much does it cost to fix code P0AE6 on a Cadillac?

The cost varies depending on the issue, ranging from $100-$300 for wiring repairs to $1,000+ if the battery control module or precharge relay needs replacement.