AutoCodes – GMC – P0AC7 GMC

P0AC7 GMC 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 GMC 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 615

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

What does this mean?

What are the Possible Causes of the DTC P0AC7 GMC?

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 GMC?

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 GMC 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 GMC code?

Need more information on how to fix the P0AC7 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

P0AC7 2014 GMC Sierra — Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage
P0AC7 2015 GMC Sierra — Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage
P0AC7 2016 GMC Sierra — Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage
P0AC7 2017 GMC Sierra — Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage
P0AC7 2018 GMC Sierra — Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage

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 GMC Code

1. What are the common symptoms of OBDII code P0AC7 in a GMC hybrid/EV vehicle?

The common symptoms of code P0AC7 include reduced fuel efficiency, decreased performance, and potential issues with battery charging.

2. What can cause the Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage code in a GMC vehicle?

This code is often triggered by a malfunction in the battery temperature sensor, faulty wiring or connectors, or a problem with the hybrid/EV battery itself.

3. How can I diagnose the cause of OBDII code P0AC7 in my GMC hybrid/EV vehicle?

Diagnosing this code typically involves using a scan tool to retrieve the specific fault codes, testing the battery temperature sensor and related components, and inspecting the wiring for any damage or loose connections.

4. Is it safe to continue driving my GMC vehicle with the P0AC7 code present?

It is not recommended to continue driving with the P0AC7 code active, as it can lead to further damage to the hybrid/EV system and potentially cause the vehicle to enter a reduced power mode.

5. Can I repair the Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage issue in my GMC vehicle myself?

While some DIY enthusiasts may attempt to diagnose and repair this issue, it is recommended to seek professional help or take the vehicle to a certified technician with experience in hybrid/EV systems for proper diagnosis and repair.

6. Are there any quick fixes or temporary solutions for OBDII code P0AC7 in a GMC hybrid/EV vehicle?

Quick fixes such as resetting the fault codes or disconnecting and reconnecting the battery may temporarily clear the code, but they are not long-term solutions to the underlying issue causing the fault code.

7. How much does it typically cost to repair the Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage problem in a GMC vehicle?

The cost of repairing this issue can vary depending on the specific cause of the fault code, but it may involve replacing the battery temperature sensor, repairing wiring, or addressing any issues with the hybrid/EV battery, which can range from a couple hundred to over a thousand dollars.

8. Can extreme weather conditions affect the occurrence of OBDII code P0AC7 in a GMC hybrid/EV vehicle?

Yes, extreme temperatures can impact the performance of the battery temperature sensor and other components related to the hybrid/EV system, potentially leading to the triggering of the P0AC7 fault code.

9. Will resetting the OBDII code P0AC7 in my GMC vehicle make it go away permanently?

Simply resetting the code without addressing the underlying issue will not make it go away permanently. The fault code is likely to reappear until the root cause of the problem is diagnosed and repaired.

10. How long does it typically take to repair the Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage issue in a GMC vehicle?

The repair time can vary depending on the complexity of the issue and the availability of parts. Some repairs may be completed in a few hours, while more involved repairs might take a day or longer to complete.