Engine-Codes.com
Engine-Codes – GMC – P0746 2016 GMC Sierra

P0746 2016 GMC Sierra Code - Transmission Control Solenoid Valve 1 Stuck Off

Quick Answer

The P0746 diagnostic trouble code (DTC) for the 2016 GMC Sierra indicates an issue with the transmission control solenoid valve 1 being stuck off. Common causes include Electrical faults in the transmission control solenoid valve, Wiring issues or shorts in the electrical system, Internal mechanical problems within the transmission. 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
P0746 2016 GMC Sierra indicates Transmission Control Solenoid Valve 1 Stuck Off.
Common causes
Common causes include Electrical faults in the transmission control solenoid valve, Wiring issues or shorts in the electrical system, Internal mechanical problems within the transmission.
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 07, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0746 2016 GMC Sierra Description

The P0746 diagnostic trouble code (DTC) for the 2016 GMC Sierra indicates an issue with the transmission control solenoid valve 1 being stuck off. This solenoid is responsible for regulating the flow of transmission fluid in the transmission system. When the solenoid is stuck in the off position, it can lead to a variety of transmission problems, affecting the vehicle's performance and drivability.

OBDII Code P0746 2016 GMC Sierra - Transmission Control Solenoid Valve 1 Stuck Off
P0746 2016 GMC Sierra Code - Transmission Control Solenoid Valve 1 Stuck Off

Common Causes of P0746 2016 GMC Sierra

  1. Electrical faults in the transmission control solenoid valve
  2. Wiring issues or shorts in the electrical system
  3. Internal mechanical problems within the transmission
  4. Low transmission fluid levels or contaminated fluid

Symptoms of P0746 2016 GMC Sierra

  1. Delayed or harsh shifting
  2. Poor acceleration
  3. Decreased fuel efficiency
  4. Rough driving experience

How to Fix P0746 2016 GMC Sierra

  1. Begin by conducting a thorough diagnostic scan to confirm the P0746 code and identify the specific issue with the transmission control solenoid valve 1.
  2. Inspect the wiring and electrical connections related to the solenoid to check for any faults or shorts.
  3. Test the solenoid itself to determine if it is functioning properly and replace it if necessary.
  4. Check the transmission fluid levels and condition, topping up or replacing it if needed.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved and that the transmission is shifting smoothly.

Cost to Fix P0746 2016 GMC Sierra

The typical repair costs for addressing a P0746 code related to the transmission control solenoid valve 1 stuck off can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. To obtain a more precise estimate, it is advisable to check local rates before proceeding with the repair.

What does this mean?

Tech Notes for P0746 2016 GMC Sierra

When a transmission solenoid has malfunctioned, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is dirty, it's recommended to change the transmission fluid and if possible, remove the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a mechanical transmission failure, and that the transmission will need to be rebuilt or replaced.

Need more information about the P0746 2016 GMC Sierra code?

Need more information on how to fix the P0746 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0746 2016 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 P0746 2016 GMC Sierra Code

No Frequently Asked Questions about P0746 2016 GMC Sierra Code found.

Discuss the causes and fixes for P0746 2016 GMC Sierra OBDII Code

Submit a New Comment

Code P0746 2016 GMC Sierra comments

No comments found for this page.