AutoCodes – Chevrolet – P0746 2014 Chevrolet Silverado

P0746 2014 Chevrolet Silverado Code - Transmission Control Solenoid Valve 1 Stuck Off

Quick Answer

The solenoid actuator controls fluid pressure by moving the clutch 1-2-3-4-5-6 regulator valve that controls the fluid pressure to the 1-2-3-4-5-6 clutch. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve. 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 2014 Chevrolet Silverado indicates Transmission Control Solenoid Valve 1 Stuck Off.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve.
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 656

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 30, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0746 2014 Chevrolet Silverado Description

The solenoid actuator controls fluid pressure by moving the clutch 1-2-3-4-5-6 regulator valve that controls the fluid pressure to the 1-2-3-4-5-6 clutch. The Solenoid Valve is an electronic pressure actuator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid’s plunger further away from the exhaust port. Opening the exhaust port decreases the output fluid pressure regulated by the solenoid valve, which ultimately decreases line pressure.

OBDII Code P0746 2014 Chevrolet Silverado - Transmission Control Solenoid Valve 1 Stuck Off - AutoCodes.com — P0746 2014 Chevrolet Silverado Code - Transmission Control Solenoid Valve 1 Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0746 2014 Chevrolet Silverado?

Low transmission fluid level
Dirty transmission fluid
Faulty Transmission Control Solenoid Valve
Transmission Control Solenoid Valve harness is open or shorted
Transmission Control Solenoid Valve circuit poor electrical connection

How to Fix the DTC P0746 2014 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0746 2014 Chevrolet Silverado 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.

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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 P0746 2014 Chevrolet Silverado Code

1. What does OBDII code P0746 mean for a 2014 Chevrolet Silverado?

P0746 indicates that the transmission control solenoid valve 1 is stuck off, which can affect the transmission's ability to shift properly.

2. What are common symptoms of code P0746 in a 2014 Chevrolet Silverado?

Symptoms may include harsh or delayed shifting, transmission slipping, reduced fuel efficiency, and the check engine light turning on.

3. What causes code P0746 on a 2014 Chevrolet Silverado?

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

4. Can driving with code P0746 damage my 2014 Chevrolet Silverado?

Yes, continued driving with this code may lead to further transmission damage or failure, especially if the problem is related to low fluid or internal issues.

5. How can I diagnose code P0746 on my 2014 Chevrolet Silverado?

Diagnosis typically involves scanning the vehicle with an OBDII tool, inspecting the transmission fluid, checking the solenoid and wiring for damage, and possibly performing a pressure test on the transmission.

6. How do I fix code P0746 on a 2014 Chevrolet Silverado?

Repairs may include replacing the faulty solenoid, refilling or flushing the transmission fluid, repairing damaged wiring, or addressing internal transmission problems.

7. How much does it cost to fix code P0746 on a 2014 Chevrolet Silverado?

Costs can range from $150 to $400 for solenoid replacement, but if internal transmission repairs are needed, costs could exceed $1,000.

8. Can dirty transmission fluid cause code P0746 in a 2014 Chevrolet Silverado?

Yes, dirty or contaminated transmission fluid can cause the solenoid to stick or malfunction, leading to this code.

9. How do I prevent code P0746 from occurring again in my 2014 Chevrolet Silverado?

Regularly check and replace the transmission fluid as needed, perform routine transmission maintenance, and address any warning signs promptly.

10. Is replacing the transmission control solenoid a DIY job for code P0746 on a 2014 Chevrolet Silverado?

It can be a DIY job for experienced mechanics, but it typically requires access to the transmission and specialized tools, so professional help is recommended for most drivers.