AutoCodes – GMC – P0669 2016 GMC Sierra

P0669 2016 GMC Sierra Code - Control Module Temperature Sensor Circuit High Voltage

Quick Answer

The Transmission Control Module (TCM) temperature sensor is located inside of the control solenoid valve assembly which has no serviceable parts. Common causes include Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted, Control Solenoid Valve Assembly circuit poor electrical connection. 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: P0669 2016 GMC Sierra indicates Control Module Temperature Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted, Control Solenoid Valve Assembly circuit poor electrical connection.
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 188

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 Sep 23, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0669 2016 GMC Sierra Description

The Transmission Control Module (TCM) temperature sensor is located inside of the control solenoid valve assembly which has no serviceable parts. The Transmission Control Module temperature sensor provides the temperature of the Transmission Control Module substrate. This temperature reading is used in various diagnostic routines in the Transmission Control Module software. This fault is handled inside the Transmission Control Module and no external circuits are involved. The Diagnostic Trouble Code (DTC) will be set when the TCM internal temperature is 249°C (480°F) or greater for 1 min.

OBDII Code P0669 2016 GMC Sierra - Control Module Temperature Sensor Circuit High Voltage - AutoCodes.com — P0669 2016 GMC Sierra Code - Control Module Temperature Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0669 2016 GMC Sierra?

Faulty Control Solenoid Valve Assembly
Control Solenoid Valve Assembly harness is open or shorted
Control Solenoid Valve Assembly circuit poor electrical connection

How to Fix the DTC P0669 2016 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 P0669 2016 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 P0669 2016 GMC Sierra code?

Need more information on how to fix the P0669 2016 GMC Sierra code? Get Access to Factory Service Manuals

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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 P0669 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P0669 in a 2016 GMC Sierra?

The common symptoms of OBDII code P0669 in a 2016 GMC Sierra include the Check Engine Light coming on, reduced engine performance, and potential issues with the vehicle's fuel economy.

2. What does OBDII code P0669 indicate in a 2016 GMC Sierra?

OBDII code P0669 in a 2016 GMC Sierra indicates a problem with the Control Module Temperature Sensor Circuit showing high voltage.

3. What are the possible causes of OBDII code P0669 in a 2016 GMC Sierra?

Possible causes of OBDII code P0669 in a 2016 GMC Sierra include a faulty control module temperature sensor, wiring issues in the temperature sensor circuit, or a malfunction in the engine control module.

4. How can I diagnose OBDII code P0669 in my 2016 GMC Sierra?

Diagnosing OBDII code P0669 in a 2016 GMC Sierra involves using an OBDII scanner to retrieve the code, inspecting the control module temperature sensor and its wiring for any damage, and testing the sensor's voltage output.

5. Can I drive my 2016 GMC Sierra with OBDII code P0669?

It is not recommended to drive your 2016 GMC Sierra with OBDII code P0669 present, as it can lead to further engine issues and potential damage if left unresolved.

6. How can I repair OBDII code P0669 in my 2016 GMC Sierra?

Repairing OBDII code P0669 in a 2016 GMC Sierra may involve replacing the control module temperature sensor, repairing any damaged wiring in the circuit, or reprogramming the engine control module.

7. Will clearing the OBDII code P0669 in my 2016 GMC Sierra resolve the issue?

Clearing the OBDII code P0669 in a 2016 GMC Sierra may temporarily turn off the Check Engine Light, but it will not fix the underlying problem causing the high voltage in the control module temperature sensor circuit.

8. How much does it cost to fix OBDII code P0669 in a 2016 GMC Sierra?

The cost to fix OBDII code P0669 in a 2016 GMC Sierra can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor.

9. Can a DIY enthusiast repair OBDII code P0669 in a 2016 GMC Sierra?

A DIY enthusiast with automotive repair experience and the necessary tools may be able to repair OBDII code P0669 in a 2016 GMC Sierra, especially if the issue is related to a simple sensor replacement or wiring repair.

10. How soon should I address OBDII code P0669 in my 2016 GMC Sierra?

It is recommended to address OBDII code P0669 in your 2016 GMC Sierra as soon as possible to prevent further damage to the vehicle's engine and to ensure optimal performance and efficiency.