AutoCodes – GMC – P2671 2015 GMC Sierra

P2671 2015 GMC Sierra Code - Actuator High Control Circuit Group 2 High Voltage

Quick Answer

The Transmission Control Module (TCM) receives information from a variety of sensors, switches, and serial data information from other control modules. Common causes include Faulty Transmission Control Solenoid Valve, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted. 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: P2671 2015 GMC Sierra indicates Actuator High Control Circuit Group 2 High Voltage.
Common causes: Common causes include Faulty Transmission Control Solenoid Valve, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted.
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 460

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 Jul 18, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2671 2015 GMC Sierra Description

The Transmission Control Module (TCM) receives information from a variety of sensors, switches, and serial data information from other control modules. This information is used to control a combination of solenoid valves to obtain the correct line pressure, gear ratio, and torque converter clutch operation. The Transmission Control Solenoid Valves are electro-mechanically operated valves. The valves are controlled by an electric current through the solenoid. The TCM high side driver 2 is located inside of the control solenoid valve assembly which has no serviceable parts. The high side driver 2 provides power to the Transmission Control Module pressure control solenoids and shift solenoids. The Diagnostic Trouble Code (DTC) will be set when the TCM detects an internal short to voltage on the high side driver 2 circuit for 1 s after engine start.

OBDII Code P2671 2015 GMC Sierra - Actuator High Control Circuit Group 2 High Voltage - AutoCodes.com — P2671 2015 GMC Sierra Code - Actuator High Control Circuit Group 2 High Voltage

What does this mean?

What are the Possible Causes of the DTC P2671 2015 GMC Sierra?

Faulty Transmission Control Solenoid Valve
Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC P2671 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 P2671 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.

Need more information about the P2671 2015 GMC Sierra 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 P2671 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P2671 in a 2015 GMC Sierra?

- Common symptoms include rough idling, reduced engine performance, and potential stalling of the vehicle.

2. What does the OBDII code P2671 "Actuator High Control Circuit Group 2 High Voltage" indicate in a 2015 GMC Sierra?

- This code indicates that there is high voltage detected in the actuator high control circuit group 2.

3. What are the possible causes of OBDII code P2671 in a 2015 GMC Sierra?

- Possible causes include a faulty actuator, damaged wiring or connectors in the control circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the OBDII code P2671 in my 2015 GMC Sierra?

- Diagnosing the code typically involves checking the actuator, inspecting the wiring and connectors for damage, and testing the ECM for any issues.

5. Can I continue driving my 2015 GMC Sierra with OBDII code P2671?

- It is not recommended to continue driving the vehicle with this code as it can lead to further damage and potential safety issues.

6. Will resetting the OBDII code P2671 in my 2015 GMC Sierra solve the issue?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the code to trigger.

7. How much does it cost to repair OBDII code P2671 in a 2015 GMC Sierra?

- Repair costs can vary depending on the specific cause of the code, but it is recommended to consult a professional mechanic for an accurate estimate.

8. Can I repair OBDII code P2671 in my 2015 GMC Sierra myself?

- While some DIY enthusiasts may attempt to diagnose and repair this code, it is recommended to seek professional help, especially for complex electrical issues.

9. Are there any preventive measures to avoid OBDII code P2671 in a 2015 GMC Sierra?

- Regular maintenance and inspections of the vehicle's actuators, wiring, and ECM can help prevent issues that may trigger this code.

10. How long does it take to repair OBDII code P2671 in a 2015 GMC Sierra?

- The repair time can vary based on the specific cause and complexity of the issue, so it is best to consult with a mechanic for a more accurate timeframe.