AutoCodes – GMC – P0AC7 2017 GMC Sierra

P0AC7 2017 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage

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: P0AC7 2017 GMC Sierra indicates Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage.
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 190

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 P0AC7 2017 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 hybrid battery temperature sensor is greater than 160°C (320°F).

OBDII Code P0AC7 2017 GMC Sierra - Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage - AutoCodes.com — P0AC7 2017 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0AC7 2017 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 P0AC7 2017 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 P0AC7 2017 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 P0AC7 2017 GMC Sierra code?

Need more information on how to fix the P0AC7 2017 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 P0AC7 2017 GMC Sierra Code

1. What does the OBDII code P0AC7 mean on a 2017 GMC Sierra?

P0AC7 indicates a low voltage issue in the Hybrid/EV Battery Temperature Sensor 2 Circuit, which monitors the temperature of the hybrid battery pack.

2. What are the common symptoms of code P0AC7 on a 2017 GMC Sierra?

Symptoms may include the hybrid system warning light, reduced fuel efficiency, limited hybrid functionality, or the vehicle operating solely on the internal combustion engine.

3. What causes the P0AC7 code to appear on a GMC Sierra?

Common causes include a faulty battery temperature sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning battery control module.

4. Can I drive my 2017 GMC Sierra with the P0AC7 code?

Itâ€™s not recommended to drive with this code active as it may lead to overheating or damage to the hybrid battery system.

5. How do you diagnose the P0AC7 code on a GMC Sierra?

Diagnosis involves using a scan tool to check for related codes, inspecting the temperature sensor and wiring for damage, and testing the sensor's voltage and resistance.

6. How is the P0AC7 code fixed on a 2017 GMC Sierra?

Repairs may include replacing the faulty temperature sensor, repairing or replacing damaged wiring, or reprogramming the battery control module if necessary.

7. How much does it cost to fix the P0AC7 code on a GMC Sierra?

Repair costs vary but typically range from $150 to $400, depending on whether the issue is sensor replacement or wiring repair.

8. Can a dead hybrid battery cause the P0AC7 code?

While a dead hybrid battery itself wonâ€™t directly trigger this code, it can contribute to related issues if the battery system is compromised.

9. Does the P0AC7 code affect the overall performance of the GMC Sierra?

Yes, it can limit the hybrid system's efficiency and performance, potentially causing the vehicle to rely solely on the gas engine.

10. How can I prevent the P0AC7 code from recurring on my GMC Sierra?

Regular maintenance of the hybrid system, ensuring proper wiring connections, and addressing warning signs early can help prevent this code from returning.