P0AC8 2015 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 2 Circuit High 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
- P0AC8 2015 GMC Sierra indicates Hybrid/EV Battery Temperature Sensor 2 Circuit High 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.
Code P0AC8 2015 GMC Sierra Description
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 less than -69°C (-92°F).
What are the Possible Causes of the DTC P0AC8 2015 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 P0AC8 2015 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 P0AC8 2015 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.
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Frequently Asked Questions about P0AC8 2015 GMC Sierra Code
1. What does the OBDII code P0AC8 mean on a 2015 GMC Sierra?
P0AC8 indicates a problem with the Hybrid/EV Battery Temperature Sensor 2 circuit, specifically detecting high voltage, which could be caused by a sensor malfunction or wiring issue.
2. What are the symptoms of code P0AC8 in a 2015 GMC Sierra?
Common symptoms include the check engine light or hybrid warning light being illuminated, poor hybrid system performance, reduced fuel efficiency, or limited power mode activation.
3. What causes the P0AC8 code to appear on a GMC Sierra?
Potential causes include a faulty battery temperature sensor, damaged wiring or connectors, corroded electrical contacts, or a malfunctioning hybrid control module.
4. How is the P0AC8 code diagnosed?
A technician will use a scan tool to confirm the code, inspect the battery temperature sensor and associated wiring, and test the circuit for continuity and proper voltage levels.
5. Can I continue driving with the P0AC8 code on my GMC Sierra?
It’s not recommended to drive for an extended period with this code, as it may affect the hybrid system's performance and lead to further damage.
6. How do you fix the P0AC8 code on a 2015 GMC Sierra?
Repairs may involve replacing the faulty battery temperature sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the hybrid control module if needed.
7. Is the P0AC8 code covered under warranty for a 2015 GMC Sierra?
It depends on your vehicle’s warranty and coverage for hybrid system components. Check with your GMC dealer for specifics.
8. How much does it cost to fix the P0AC8 code on a GMC Sierra?
Repair costs vary but typically range from $150 to $500, depending on whether the issue is with the sensor, wiring, or control module.
9. Can a weak hybrid battery cause the P0AC8 code?
While the code specifically relates to the temperature sensor circuit, a failing hybrid battery could indirectly cause sensor or circuit issues.
10. How can I prevent the P0AC8 code from recurring?
Regular maintenance of the hybrid system, including inspecting wiring and connectors for damage or corrosion, can help prevent this code from recurring.
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