AutoCodes – Buick – P1751 Buick

P1751 Buick Code - Shift Valve 1 Performance

Quick Answer

The Shift Solenoid (SS) 1 is part of the Control Solenoid Valve Assembly, which has no serviceable parts. Common causes include Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted, Control Solenoid Valve Assembly circuit poor electrical connection. 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: P1751 Buick indicates Shift Valve 1 Performance.
Common causes: Common causes include Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted, Control Solenoid Valve Assembly circuit poor electrical connection.
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 717

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 24, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1751 Buick Description

The Shift Solenoid (SS) 1 is part of the Control Solenoid Valve Assembly, which has no serviceable parts. SS 1 provides fluid pressure to control the operation of the clutch select valve 2, which is located in the control valve lower body assembly. SS 1, in conjunction with clutch select valve 2, controls fluid to the R1 and 4-5-6 clutches. A diagnostic test is performed by the Transmission Control Module (TCM) to determine the state of the clutch select valve 2. During this diagnostic test, the TCM commands the SS 1 ON, supplying pressure to move the clutch select valve 2 toward its spring. At the same time, line pressure is elevated slightly to assist the spring side pressure. If the spring is broken, or the clutch select valve 2 cannot move due to another mechanical condition the Diagnostic Trouble Code (DTC) will set.

OBDII Code P1751 Buick - Shift Valve 1 Performance - AutoCodes.com — P1751 Buick Code - Shift Valve 1 Performance

What does this mean?

What are the Possible Causes of the DTC P1751 Buick?

Faulty Control Solenoid Valve Assembly
Control Solenoid Valve Assembly harness is open or shorted
Control Solenoid Valve Assembly circuit poor electrical connection

How to Fix the DTC P1751 Buick?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1751 Buick 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 P1751 Buick Code

1. What are common symptoms of OBDII code P1751 in a Buick related to Shift Valve 1 Performance?

Symptoms may include harsh shifting, transmission slipping, delayed engagement, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code P1751 Shift Valve 1 Performance in a Buick?

Common causes could be a faulty shift solenoid, low transmission fluid level, a malfunctioning transmission control module (TCM), or internal transmission issues.

3. How can I diagnose the source of OBDII code P1751 in my Buick?

Diagnosis typically involves using a scan tool to retrieve the trouble code, inspecting the transmission fluid level and condition, checking for any visible damage to wiring or connectors, and performing a thorough transmission system inspection.

4. Can driving with OBDII code P1751 Shift Valve 1 Performance in a Buick cause further damage?

Continued driving with this code may lead to further damage to the transmission components and can result in a complete transmission failure if left unresolved for an extended period.

5. Is it safe to continue driving my Buick with OBDII code P1751 present?

It is not recommended to drive the vehicle with this code active, as it can lead to poor driving performance, potential safety hazards, and further damage to the transmission system.

6. How can I repair OBDII code P1751 Shift Valve 1 Performance in my Buick?

Repair options may include replacing the faulty shift solenoid, addressing any transmission fluid issues, repairing or replacing damaged wiring or connectors, or reprogramming the TCM.

7. Can I reset OBDII code P1751 in my Buick to see if it reoccurs?

While you can clear the code with a scan tool, it is important to address the underlying issue causing the code before resetting it, as it may reappear if the problem persists.

8. Are there any DIY tips for fixing OBDII code P1751 in a Buick at home?

Simple DIY tasks such as checking and topping up transmission fluid, inspecting wiring connections, and cleaning connectors can sometimes resolve minor issues related to this code.

9. How much does it typically cost to repair OBDII code P1751 Shift Valve 1 Performance in a Buick?

The cost of repair can vary depending on the specific cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can a mechanic help me diagnose and repair OBDII code P1751 in my Buick?

Yes, a qualified mechanic or technician with experience in diagnosing and repairing transmission issues can efficiently identify the root cause of the code and perform the necessary repairs to resolve it.