AutoCodes – Chevrolet – P0746 2015 Chevrolet Silverado

P0746 2015 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 2015 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 561

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 2015 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 2015 Chevrolet Silverado - Transmission Control Solenoid Valve 1 Stuck Off - AutoCodes.com — P0746 2015 Chevrolet Silverado Code - Transmission Control Solenoid Valve 1 Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0746 2015 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 2015 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 2015 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.

Need more information about the P0746 2015 Chevrolet Silverado 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 P0746 2015 Chevrolet Silverado Code

1. What does OBDII code P0746 on a 2015 Chevrolet Silverado indicate?

The code P0746 points to an issue with the Transmission Control Solenoid Valve 1 being stuck off.

2. What are the common symptoms of a Transmission Control Solenoid Valve 1 Stuck Off issue on a Chevrolet Silverado?

Symptoms may include harsh shifting, transmission slipping, poor fuel economy, and possibly the vehicle going into "limp mode."

3. What are the possible causes of the Transmission Control Solenoid Valve 1 Stuck Off trouble code?

Common causes include a faulty solenoid, low transmission fluid levels, dirty or contaminated transmission fluid, or wiring/connectivity issues.

4. How serious is the P0746 OBDII code on a 2015 Chevrolet Silverado?

Ignoring this code can lead to further damage to the transmission system, potentially resulting in costly repairs. It is advisable to address the issue promptly.

5. Can I continue driving my Chevrolet Silverado with the P0746 code present?

It's not recommended to drive the vehicle extensively with this code active, as it can lead to transmission problems. Get it checked and repaired as soon as possible.

6. How can I diagnose a Transmission Control Solenoid Valve 1 Stuck Off problem on my 2015 Chevrolet Silverado?

Proper diagnosis involves using a scan tool to read the code, checking the transmission fluid level and condition, and inspecting the solenoid and related wiring.

7. What is the typical repair process for fixing the P0746 code on a Chevrolet Silverado?

Repairs may involve replacing the faulty solenoid, cleaning or flushing the transmission fluid, addressing any wiring issues, and resetting the trouble code.

8. Can I fix the Transmission Control Solenoid Valve issue on my Chevrolet Silverado myself?

While some DIY enthusiasts may attempt the repair, it is recommended to have a qualified mechanic diagnose and fix the problem to ensure it is done correctly.

9. How much does it cost to repair a Transmission Control Solenoid Valve 1 Stuck Off issue on a 2015 Chevrolet Silverado?

Repair costs can vary depending on the exact cause of the problem, but it may range from a couple of hundred dollars for a simple fix to over a thousand for more complex issues.

10. How can I prevent the P0746 code from reoccurring on my Chevrolet Silverado after repair?

Regularly servicing your transmission, maintaining proper fluid levels, and addressing any related issues promptly can help prevent the reoccurrence of the P0746 trouble code.