AutoCodes – GMC – P0AC6 2018 GMC Sierra

P0AC6 2018 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 2 Performance

Quick Answer

Hybrid/EV Battery Temperature Sensors are used to monitor the battery temperature. Common causes include Faulty Hybrid/EV Battery Assembly, Hybrid/EV Battery Assembly harness is open or shorted, Hybrid/EV Battery Assembly 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: P0AC6 2018 GMC Sierra indicates Hybrid/EV Battery Temperature Sensor 2 Performance.
Common causes: Common causes include Faulty Hybrid/EV Battery Assembly, Hybrid/EV Battery Assembly harness is open or shorted, Hybrid/EV Battery Assembly 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 158

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 Mar 22, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0AC6 2018 GMC Sierra Description

Hybrid/EV Battery Temperature Sensors are used to monitor the battery temperature. The non-serviceable battery temperature sensors are located within the battery sections. Two temperature sensors are located in each battery section. The temperature sensor is a variable resistor that measures the temperature of the battery cell group. The hybrid/EV interface control module supplies 5 V to the signal circuit and is a ground for the low reference circuit. The battery temperature sensor resistance changes with battery temperature. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases.
Each Hybrid/EV Battery Interface Control Module communicates the temperature sensor values to the Hybrid/EV Powertrain Control Module via serial data.
The Hybrid/EV Powertrain Control Module uses the battery temperature sensors to determine the Hybrid/EV Battery Module temperature in order to control the battery cooling system operation.
The Diagnostic Trouble Code (DTC) will be set when the difference between a single battery temperature sensor and an average of the other battery temperature sensors is greater than 25°C (45°F).

OBDII Code P0AC6 2018 GMC Sierra - Hybrid/EV Battery Temperature Sensor 2 Performance - AutoCodes.com — P0AC6 2018 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 2 Performance

What does this mean?

What are the Possible Causes of the DTC P0AC6 2018 GMC Sierra?

Faulty Hybrid/EV Battery Assembly
Hybrid/EV Battery Assembly harness is open or shorted
Hybrid/EV Battery Assembly circuit poor electrical connection
Faulty Hybrid/EV Battery Interface Control Module

How to Fix the DTC P0AC6 2018 GMC Sierra?

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 P0AC6 2018 GMC Sierra 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 P0AC6 2018 GMC Sierra code?

Need more information on how to fix the P0AC6 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P0AC6 2018 GMC Sierra Code

1. What does the OBDII code P0AC6 mean on a 2018 GMC Sierra?

P0AC6 indicates an issue with the performance of Hybrid/EV Battery Temperature Sensor 2, which monitors the temperature of the hybrid/EV battery pack.

2. What are the common symptoms of the P0AC6 code on a 2018 GMC Sierra?

Common symptoms include reduced fuel efficiency, limited hybrid system performance, warning lights on the dashboard, and potential overheating of the battery system.

3. What causes the P0AC6 code to appear on a 2018 GMC Sierra?

Possible causes include a faulty battery temperature sensor, damaged wiring or connectors, software issues in the hybrid control module, or a problem with the battery pack itself.

4. Can I drive my 2018 GMC Sierra with the P0AC6 code active?

While the vehicle might still function, driving with this code is not recommended, as it could lead to further damage to the hybrid battery system or reduced vehicle performance.

5. How is the P0AC6 code diagnosed on a 2018 GMC Sierra?

A technician will use a scan tool to verify the code, check the hybrid battery temperature readings, inspect the sensor and wiring for damage, and test the hybrid control module for faults.

6. How do you fix the P0AC6 code on a 2018 GMC Sierra?

Repairs may include replacing the faulty battery temperature sensor, repairing or replacing damaged wiring or connectors, updating the hybrid control module software, or addressing issues with the battery pack.

7. How much does it cost to repair the P0AC6 code on a 2018 GMC Sierra?

Repair costs can vary, but replacing a battery temperature sensor typically ranges from $100 to $300, depending on labor rates and part prices.

8. Can a software update fix the P0AC6 code on a 2018 GMC Sierra?

Yes, in some cases, a software update for the hybrid control module may resolve the issue if it is related to incorrect sensor data processing.

9. What happens if the P0AC6 code is ignored on a 2018 GMC Sierra?

Ignoring this code can lead to hybrid battery overheating, reduced system performance, or potential long-term damage to the battery pack.

10. Is the P0AC6 code specific to hybrid or electric versions of the 2018 GMC Sierra?

Yes, the P0AC6 code is specific to vehicles with hybrid or electric systems and relates to the performance of the hybrid/EV battery temperature monitoring system.