AutoCodes – GMC – P2671 GMC

P2671 GMC 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 GMC 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 1,124

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

What does this mean?

What are the Possible Causes of the DTC P2671 GMC?

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 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 P2671 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 P2671 GMC code?

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Need Help with the Code?

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Information for Specific GMC Models

P2671 2014 GMC Sierra — Actuator High Control Circuit Group 2 High Voltage
P2671 2015 GMC Sierra — Actuator High Control Circuit Group 2 High Voltage
P2671 2016 GMC Sierra — Actuator High Control Circuit Group 2 High Voltage
P2671 2017 GMC Sierra — Actuator High Control Circuit Group 2 High Voltage
P2671 2018 GMC Sierra — Actuator High Control Circuit Group 2 High 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 P2671 GMC Code

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

- Common symptoms include rough idling, engine misfires, reduced engine performance, and the Check Engine Light illuminating.

2. What does the OBDII code P2671 GMC Actuator High Control Circuit Group 2 High Voltage indicate?

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

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

- Potential causes include a faulty actuator, wiring issues in the control circuit, a malfunctioning engine control module (ECM), or a short circuit.

4. How can I diagnose OBDII code P2671 in my GMC vehicle?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the code, checking the actuator and control circuit for faults, and testing the ECM for proper operation.

5. Can I still drive my GMC vehicle with OBDII code P2671 present?

- It is not recommended to drive your vehicle with this code active, as it can lead to further engine damage and unsafe driving conditions.

6. How serious is OBDII code P2671 in a GMC vehicle?

- This code should be addressed promptly to prevent potential engine damage and ensure the vehicle operates safely and efficiently.

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

- The cost of repairing this code can vary depending on the exact cause, but it may involve replacing the actuator, repairing wiring, or reprogramming the ECM, with costs ranging from $100 to $500 or more.

8. Can I reset the Check Engine Light associated with OBDII code P2671 in my GMC without fixing the issue?

- While you can temporarily clear the Check Engine Light by resetting the ECM, it is important to address the underlying issue causing the code to prevent further problems.

9. Are there any DIY repair tips for fixing OBDII code P2671 in a GMC vehicle?

- DIY repair tips may include checking for loose or damaged wiring connections, inspecting the actuator for wear or damage, and ensuring proper grounding of the control circuit.

10. How can I prevent OBDII code P2671 from appearing in my GMC vehicle in the future?

- Regular maintenance, such as checking and replacing worn components, keeping the vehicle's electrical system in good condition, and addressing any issues promptly, can help prevent this code from reoccurring.