AutoCodes – GMC – P2669 2018 GMC Sierra

P2669 2018 GMC Sierra Code - Actuator High Control Circuit Group 2

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: P2669 2018 GMC Sierra indicates Actuator High Control Circuit Group 2.
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 229

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 P2669 2018 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 open or short to ground or voltage on the high side driver 2 for 1 s.

OBDII Code P2669 2018 GMC Sierra - Actuator High Control Circuit Group 2 - AutoCodes.com — P2669 2018 GMC Sierra Code - Actuator High Control Circuit Group 2

What does this mean?

What are the Possible Causes of the DTC P2669 2018 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 P2669 2018 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 P2669 2018 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 P2669 2018 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 P2669 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P2669 in a 2018 GMC Sierra?

- Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and a noticeable decrease in engine performance.

2. What can cause the OBDII code P2669 to trigger in a 2018 GMC Sierra?

- The code P2669 typically triggers due to issues with the actuator high control circuit group 2, which can be caused by wiring issues, a faulty actuator, or a problem with the engine control module (ECM).

3. How can I diagnose the OBDII code P2669 in my 2018 GMC Sierra?

- Diagnosing the code P2669 involves using an OBDII scanner to read the trouble codes and performing a thorough inspection of the actuator high control circuit group 2 components for any visible damage or faults.

4. Can I drive my 2018 GMC Sierra with the OBDII code P2669 present?

- It is not recommended to drive your vehicle with the code P2669 present, as it can lead to further damage to the engine components and potentially cause more serious issues over time.

5. How can I repair the OBDII code P2669 in my 2018 GMC Sierra?

- Repairing the code P2669 typically involves addressing the root cause of the issue, which may include repairing or replacing damaged wiring, replacing a faulty actuator, or reprogramming the engine control module.

6. Is it safe to clear the OBDII code P2669 in my 2018 GMC Sierra with a diagnostic tool?

- Clearing the code P2669 with a diagnostic tool may temporarily turn off the check engine light, but it is important to address the underlying issue causing the code to prevent further problems.

7. How much does it cost to repair the OBDII code P2669 in a 2018 GMC Sierra?

- The cost of repairing the code P2669 can vary depending on the underlying issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can the OBDII code P2669 in a 2018 GMC Sierra cause permanent damage to the engine?

- Ignoring the code P2669 and continuing to drive the vehicle with this issue can potentially cause permanent damage to the engine, so it is crucial to address the problem promptly.

9. Are there any preventive maintenance steps I can take to avoid the OBDII code P2669 in my 2018 GMC Sierra?

- Regularly inspecting and maintaining the engine components, including the actuator high control circuit group 2, can help prevent issues that may trigger the code P2669 in your GMC Sierra.

10. Can a DIY enthusiast repair the OBDII code P2669 in a 2018 GMC Sierra, or is it best left to professionals?

- While some DIY enthusiasts may have the skills to diagnose and repair the code P2669, it is recommended to consult with a professional mechanic for accurate diagnosis and proper repair to ensure the issue is resolved effectively.