AutoCodes – Saturn – P0751 Saturn

P0751 Saturn Code - 1-2 Shift Solenoid Valve Performance - No First or Fourth Gear

Quick Answer

The 1-2 Shift Solenoid (SS) valve controls the fluid flow acting on the 1-2 and 3-4 shift valves. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty 1-2 Shift 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: P0751 Saturn indicates 1-2 Shift Solenoid Valve Performance - No First or Fourth Gear.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty 1-2 Shift 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 8,637

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0751 Saturn Description

The 1-2 Shift Solenoid (SS) valve controls the fluid flow acting on the 1-2 and 3-4 shift valves. The 1-2 SS valve is a normally-open exhaust valve that is used with the 2-3 SS valve, in order to allow four different shifting combinations.

OBDII Code P0751 Saturn - 1-2 Shift Solenoid Valve Performance - No First or Fourth Gear - AutoCodes.com — P0751 Saturn Code - 1-2 Shift Solenoid Valve Performance - No First or Fourth Gear

What does this mean?

What are the Possible Causes of the DTC P0751 Saturn?

Low transmission fluid level
Dirty transmission fluid
Faulty 1-2 Shift Solenoid valve
1-2 Shift Solenoid valve harness or connectors
1-2 Shift Solenoid valve circuit is open or shorted

How to Fix the DTC P0751 Saturn?

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 the 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 recommend changing the transmission fluid and if possible removing 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 Saturn 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 P0751 Saturn Code

What does the OBDII code P0751 mean for a Saturn vehicle?

P0751 indicates an issue with the 1-2 shift solenoid valve, which may be stuck or malfunctioning, causing problems with shifting into first or fourth gear.

What are the common symptoms of the P0751 code in a Saturn?

Symptoms may include the transmission failing to shift into first or fourth gear, delayed or harsh shifting, and the illumination of the check engine light.

What causes the P0751 code to appear in a Saturn?

Common causes include a faulty 1-2 shift solenoid, low or dirty transmission fluid, damaged wiring or connectors, or internal transmission issues such as valve body wear.

Can low transmission fluid trigger the P0751 code?

Yes, low or dirty transmission fluid can lead to improper solenoid operation and trigger the P0751 code.

How can I diagnose the P0751 code in my Saturn?

Start by checking the transmission fluid level and condition, inspecting wiring and connectors to the shift solenoid, and using a scan tool to confirm solenoid operation.

Can I drive my Saturn with the P0751 code?

Driving with the P0751 code is not recommended, as it can lead to further transmission damage and cause unsafe driving conditions.

How do I fix the P0751 code in a Saturn?

Repairs may include replacing the 1-2 shift solenoid, flushing and refilling the transmission fluid, repairing damaged wiring, or addressing internal transmission problems.

How much does it cost to repair the P0751 code in a Saturn?

Repair costs vary but may range from $200 to $500 for solenoid replacement and transmission servicing, with higher costs for internal transmission repairs.

Can a faulty TCM cause the P0751 code in a Saturn?

Yes, a malfunctioning transmission control module (TCM) can mismanage solenoid operation and trigger the P0751 code.

Is it necessary to replace the entire valve body for the P0751 code?

Replacing the entire valve body may be required if significant wear or damage is found, but this should only be done after other diagnostic steps confirm the issue.