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P0747 2014 Chevrolet Silverado Code - Transmission Control Solenoid Valve 1 Stuck On

Quick Answer

The P0747 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates a problem with the Transmission Control Solenoid Valve 1 being stuck on. Common causes include Faulty transmission control solenoid valve, Wiring or electrical issues, Malfunctioning transmission control module (TCM). 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
P0747 2014 Chevrolet Silverado indicates Transmission Control Solenoid Valve 1 Stuck On.
Common causes
Common causes include Faulty transmission control solenoid valve, Wiring or electrical issues, Malfunctioning transmission control module (TCM).
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 13, 2024
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Code P0747 2014 Chevrolet Silverado Description

The P0747 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates a problem with the Transmission Control Solenoid Valve 1 being stuck on. This solenoid is responsible for regulating the flow of transmission fluid within the transmission system, controlling the engagement and disengagement of specific gears. When the solenoid is stuck in the on position, it can lead to various issues with the transmission's operation.

OBDII Code P0747 2014 Chevrolet Silverado - Transmission Control Solenoid Valve 1 Stuck On
P0747 2014 Chevrolet Silverado Code - Transmission Control Solenoid Valve 1 Stuck On

Common Causes of P0747 2014 Chevrolet Silverado

  1. Faulty transmission control solenoid valve
  2. Wiring or electrical issues
  3. Malfunctioning transmission control module (TCM)
  4. Low transmission fluid levels
  5. Mechanical issues within the transmission system

Symptoms of P0747 2014 Chevrolet Silverado

  1. Harsh or delayed shifting
  2. Erratic shifting patterns
  3. Stuck in a particular gear
  4. Poor acceleration
  5. Decreased fuel efficiency

How to Fix P0747 2014 Chevrolet Silverado

  1. Begin by conducting a thorough diagnostic scan to confirm the P0747 code and identify any other related codes or issues.
  2. Inspect the transmission control solenoid valve 1 for proper operation and replace if necessary.
  3. Check the wiring and electrical connections associated with the solenoid for any damage or corrosion, repairing or replacing as needed.
  4. Test the transmission control module (TCM) for proper function and replace if deemed faulty.
  5. Ensure proper transmission fluid levels and quality, topping up or performing a fluid flush and refill if required.

Cost to Fix P0747 2014 Chevrolet Silverado

The typical repair costs for addressing a P0747 code on a 2014 Chevrolet Silverado 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 significantly based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. For a more accurate estimate, it's advisable to inquire about local rates before proceeding with the repair.

What does this mean?

Tech Notes for P0747 2014 Chevrolet Silverado

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.

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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 P0747 2014 Chevrolet Silverado Code

1. What does OBDII code P0747 mean for a 2014 Chevrolet Silverado?

P0747 indicates that the Transmission Control Solenoid Valve 1 is stuck on, which affects the transmission's ability to shift properly.

2. What are common symptoms of code P0747 in a 2014 Chevrolet Silverado?

Symptoms include harsh or erratic shifting, transmission slipping, reduced fuel efficiency, and possibly the vehicle going into limp mode.

3. What causes code P0747 in the 2014 Chevrolet Silverado?

Common causes include a stuck or failed transmission control solenoid, dirty or low transmission fluid, wiring issues, or internal transmission damage.

4. Can code P0747 damage the transmission if ignored?

Yes, ignoring this code can lead to severe transmission damage over time due to improper lubrication and shifting.

5. How can I diagnose code P0747 on my 2014 Chevrolet Silverado?

Diagnosis involves scanning for codes, inspecting the transmission fluid for contamination, testing the solenoid for proper function, and checking wiring for damage or corrosion.

6. How do I fix code P0747 on a 2014 Chevrolet Silverado?

Fixing the issue may involve replacing the stuck solenoid, flushing or replacing transmission fluid, repairing wiring, or addressing internal transmission problems.

7. How much does it cost to repair code P0747 on a 2014 Chevrolet Silverado?

Costs vary depending on the repair needed; solenoid replacement typically ranges from $200 to $500, while more extensive transmission repairs can cost significantly more.

8. Can dirty transmission fluid cause code P0747?

Yes, dirty or contaminated transmission fluid can contribute to solenoid issues and cause this code.

9. Is it safe to drive a 2014 Chevrolet Silverado with code P0747?

Driving with this code is not recommended, as it can lead to further transmission issues and unsafe driving conditions.

10. Do I need to replace the entire transmission to fix code P0747?

Not necessarily; many cases only require solenoid replacement or fluid service, but severe cases may require more extensive repairs.

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