AutoCodes – Chevrolet – P0751 2018 Chevrolet Silverado

P0751 2018 Chevrolet Silverado Code - Shift Solenoid Valve 1 Performance Stuck Off

Quick Answer

The shift solenoid 1 is part of the control solenoid valve assembly which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Control Solenoid Valve Assembly. 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: P0751 2018 Chevrolet Silverado indicates Shift Solenoid Valve 1 Performance Stuck Off.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Control Solenoid Valve Assembly.
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 363

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 Mar 25, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0751 2018 Chevrolet Silverado Description

The shift solenoid 1 is part of the control solenoid valve assembly which has no serviceable parts. The control solenoid valve assembly is attached to the lower control valve body. The solenoid operates by the Transmission Control Module opening or closing the ground circuit. With the solenoid circuit grounded (solenoid on), the internal plunger and metering ball block the exhaust fluid creating signal fluid pressure. The signal fluid acts against the clutch select valve 2 to overcome the valve spring force moving it to the apply position, allowing the shift. The shift solenoid 1 is commanded ON in Park, Reverse, Neutral, and Drive 1 Engine Braking, and commanded OFF in Drive 1–6 gear ranges. The Diagnostic Trouble Code (DTC) will be set when the gear slip is greater than 400 RPM for 2 s.

OBDII Code P0751 2018 Chevrolet Silverado - Shift Solenoid Valve 1 Performance Stuck Off - AutoCodes.com — P0751 2018 Chevrolet Silverado Code - Shift Solenoid Valve 1 Performance Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0751 2018 Chevrolet Silverado?

Low transmission fluid level
Dirty transmission fluid
Faulty Control Solenoid Valve Assembly
Control Solenoid Valve Assembly harness or connectors
Control Solenoid Valve Assembly circuit is open or shorted

How to Fix the DTC P0751 2018 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 is stuck off, 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 very dirty, it is 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 transmission mechanical 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 P0751 2018 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 P0751 2018 Chevrolet Silverado code?

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Need Help with the 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 P0751 2018 Chevrolet Silverado Code

1. What does OBDII code P0751 in a 2018 Chevrolet Silverado mean?

The P0751 code indicates a performance issue with Shift Solenoid Valve 1, specifically that it is stuck in the off position.

2. What are the common symptoms of a Shift Solenoid Valve 1 performance issue?

Common symptoms include harsh or delayed shifting, transmission slippage, poor fuel economy, and the transmission staying in one gear.

3. What are the potential causes of the Shift Solenoid Valve 1 performance problem in a 2018 Chevrolet Silverado?

Causes can include a faulty shift solenoid, a wiring issue, low transmission fluid levels, or internal transmission damage.

4. How can I diagnose the Shift Solenoid Valve 1 issue in my 2018 Chevrolet Silverado?

Diagnosis typically involves conducting a thorough inspection of the transmission system, checking the shift solenoid's electrical connections, and performing a transmission fluid level and condition check.

5. Can I continue driving my Chevrolet Silverado with the P0751 code present?

It is not recommended to continue driving with the P0751 code, as it can lead to further damage to the transmission system if left unresolved.

6. How can I repair the Shift Solenoid Valve 1 performance problem in my Chevrolet Silverado?

Repair options may include replacing the faulty shift solenoid, repairing any damaged wiring, ensuring proper transmission fluid levels, and addressing any other underlying issues.

7. Is it advisable to reset the OBDII code P0751 in my Chevrolet Silverado after making repairs?

Yes, once the issue has been addressed and repaired, resetting the OBDII code can help clear the error code and ensure the problem has been resolved.

8. Can a DIY enthusiast fix the Shift Solenoid Valve 1 performance issue in a Chevrolet Silverado?

While some basic checks and maintenance tasks can be performed by a DIY enthusiast, diagnosing and repairing complex transmission issues like P0751 may require professional expertise.

9. How much does it typically cost to repair the Shift Solenoid Valve 1 issue in a 2018 Chevrolet Silverado?

The cost of repair can vary depending on the extent of the issue, parts needed, and labor costs. It's advisable to consult a mechanic for an accurate estimate.

10. How can I prevent the recurrence of the P0751 code in my Chevrolet Silverado in the future?

Regular maintenance, such as checking transmission fluid levels, addressing any leaks promptly, and following the manufacturer's recommended service schedule can help prevent the reoccurrence of the P0751 code.