AutoCodes – GMC – P2671 2014 GMC Sierra

P2671 2014 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 2014 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 178
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 18, 2022
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Code P2671 2014 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 2014 GMC Sierra - Actuator High Control Circuit Group 2 High Voltage - AutoCodes.com
P2671 2014 GMC Sierra Code - Actuator High Control Circuit Group 2 High Voltage

What are the Possible Causes of the DTC P2671 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the P2671 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2671 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P2671 in a 2014 GMC Sierra?

The common symptoms of OBDII code P2671 in a 2014 GMC Sierra include reduced engine performance, rough idling, and potential issues with the transmission shifting smoothly.

2. What does the OBDII code P2671 "Actuator High Control Circuit Group 2 High Voltage" indicate in a 2014 GMC Sierra?

The OBDII code P2671 indicates that there is a high voltage condition detected in the actuator high control circuit group 2 in a 2014 GMC Sierra, potentially affecting the performance of the actuator.

3. What are the possible causes of OBDII code P2671 in a 2014 GMC Sierra?

Possible causes of OBDII code P2671 in a 2014 GMC Sierra include a faulty actuator, wiring issues in the control circuit, a malfunctioning sensor, or a problem with the engine control module.

4. How can I diagnose OBDII code P2671 in a 2014 GMC Sierra?

Diagnosing OBDII code P2671 in a 2014 GMC Sierra involves using an OBDII scanner to retrieve the code, inspecting the actuator and its control circuit for any visible damage, and testing the sensor and wiring for proper functionality.

5. Can I continue driving my 2014 GMC Sierra with OBDII code P2671 present?

It is not recommended to continue driving your 2014 GMC Sierra with OBDII code P2671 present, as it can lead to further damage to the actuator and other components, potentially resulting in more costly repairs.

6. How can OBDII code P2671 in a 2014 GMC Sierra be repaired?

Repairing OBDII code P2671 in a 2014 GMC Sierra may involve replacing the faulty actuator, repairing any damaged wiring or connectors in the control circuit, or reprogramming the engine control module to address the high voltage issue.

7. Is it safe to reset the OBDII code P2671 in a 2014 GMC Sierra with a diagnostic tool?

While resetting the OBDII code P2671 with a diagnostic tool may temporarily turn off the check engine light, it is important to diagnose and repair the underlying issue causing the code to prevent future problems.

8. Can a DIY enthusiast fix OBDII code P2671 in a 2014 GMC Sierra?

Depending on their experience and tools, a DIY enthusiast may be able to fix OBDII code P2671 in a 2014 GMC Sierra by following repair guides, but it is recommended to seek professional help for accurate diagnosis and repair.

9. How much does it cost to repair OBDII code P2671 in a 2014 GMC Sierra at a dealership?

The cost to repair OBDII code P2671 in a 2014 GMC Sierra at a dealership can vary depending on the exact cause of the issue, but it may involve parts replacement, labor charges, and diagnostic fees, potentially ranging from a few hundred to over a thousand dollars.

10. Will fixing OBDII code P2671 improve the performance and fuel efficiency of my 2014 GMC Sierra?

Fixing OBDII code P2671 in a 2014 GMC Sierra can improve the performance and fuel efficiency by resolving the underlying issue affecting the actuator and control circuit, allowing the engine to operate more efficiently and smoothly.

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