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Engine-Codes – GMC – P2671 2018 GMC Sierra

P2671 2018 GMC Sierra Code - Actuator High Control Circuit Group 2 High Voltage

Quick Answer

The P2671 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Actuator High Control Circuit Group 2 High Voltage. Common causes include Faulty actuator, Damaged wiring or connectors in the control circuit, Malfunctioning control module. 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 2018 GMC Sierra indicates Actuator High Control Circuit Group 2 High Voltage.
Common causes
Common causes include Faulty actuator, Damaged wiring or connectors in the control circuit, Malfunctioning control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P2671 2018 GMC Sierra Description

The P2671 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Actuator High Control Circuit Group 2 High Voltage. This code points to a problem with the control circuit that manages the actuator in the vehicle, specifically in Group 2. The actuator is responsible for regulating various functions within the vehicle, such as adjusting the position of valves, flaps, or other mechanical components. When the control circuit shows high voltage in Group 2, it suggests that there is an electrical issue causing an abnormal voltage reading in this specific part of the system.

OBDII Code P2671 2018 GMC Sierra - Actuator High Control Circuit Group 2 High Voltage
P2671 2018 GMC Sierra Code - Actuator High Control Circuit Group 2 High Voltage

Common Causes of P2671 2018 GMC Sierra

  1. Faulty actuator
  2. Damaged wiring or connectors in the control circuit
  3. Malfunctioning control module
  4. Software issue or programming error
  5. Electrical interference or short circuits

Symptoms of P2671 2018 GMC Sierra

  1. Rough idling or engine misfires
  2. Decreased fuel efficiency
  3. Loss of power or acceleration
  4. Illumination of the check engine light
  5. Stalling or difficulty starting the vehicle

How to Fix P2671 2018 GMC Sierra

  1. Begin by performing a comprehensive diagnostic scan to retrieve the specific DTC and identify the root cause of the issue.
  2. Inspect the actuator, wiring, and connectors in Group 2 of the control circuit for any signs of damage or wear.
  3. Test the control module to ensure it is functioning correctly and communicating with the actuator as needed.
  4. If necessary, replace the faulty actuator, repair damaged wiring or connectors, or reprogram the control module to address the high voltage issue.
  5. Clear the DTC and perform a test drive to verify that the problem has been resolved and that the vehicle is operating normally.

Cost to Fix P2671 2018 GMC Sierra

The typical repair costs for addressing the Actuator High Control Circuit Group 2 High Voltage issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, you can expect to pay anywhere from $200 to $600 for parts and labor. Keep in mind that labor rates at auto repair shops can range from $80 to $150 per hour, so the total cost may be higher in certain locations or at dealerships. It's advisable to obtain quotes from multiple repair facilities to compare prices and ensure you are getting a fair deal for the necessary repairs.

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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 2018 GMC Sierra Code

1. What are common symptoms of OBDII code P2671 in a 2018 GMC Sierra?

The common symptoms of OBDII code P2671 in a 2018 GMC Sierra include rough idling, poor acceleration, and decreased fuel efficiency.

2. What does the OBDII code P2671 "Actuator High Control Circuit Group 2 High Voltage" indicate in a 2018 GMC Sierra?

The code P2671 indicates a problem with the actuator high control circuit group 2, specifically high voltage, in the 2018 GMC Sierra.

3. What are possible causes of OBDII code P2671 in a 2018 GMC Sierra?

Possible causes of OBDII code P2671 in a 2018 GMC Sierra include a faulty actuator, wiring issues, or a problem with the actuator control module.

4. How can I diagnose the OBDII code P2671 in my 2018 GMC Sierra?

To diagnose the OBDII code P2671 in a 2018 GMC Sierra, you can use an OBDII scanner to read the code, inspect the actuator and related wiring, and test the actuator control module for proper function.

5. Can I still drive my 2018 GMC Sierra with the OBDII code P2671 present?

It is not recommended to drive your 2018 GMC Sierra with the OBDII code P2671 present, as it can lead to further damage to the actuator system and potentially affect vehicle performance.

6. How can I repair OBDII code P2671 in my 2018 GMC Sierra?

The repair for OBDII code P2671 in a 2018 GMC Sierra may involve replacing the faulty actuator, repairing any damaged wiring, or reprogramming the actuator control module.

7. Will resetting the OBDII code P2671 in my 2018 GMC Sierra make it go away permanently?

Resetting the OBDII code P2671 in a 2018 GMC Sierra may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

8. Is it safe to continue driving my 2018 GMC Sierra if the OBDII code P2671 keeps coming back after repairs?

If the OBDII code P2671 keeps reappearing in your 2018 GMC Sierra after repairs, it is best to have the vehicle inspected by a professional to ensure the issue is properly resolved before driving.

9. Can a DIY enthusiast fix the OBDII code P2671 in a 2018 GMC Sierra?

A DIY enthusiast with the right tools and knowledge may be able to fix the OBDII code P2671 in a 2018 GMC Sierra, but it is recommended to consult a professional for accurate diagnosis and repairs.

10. How much does it typically cost to repair OBDII code P2671 in a 2018 GMC Sierra?

The cost to repair OBDII code P2671 in a 2018 GMC Sierra can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

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