AutoCodes – Isuzu – P0751 Isuzu

P0751 Isuzu Code - 1-2 Shift Solenoid Stuck Off

Quick Answer

1-2 shift solenoid valve is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). 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 Isuzu indicates 1-2 Shift Solenoid Stuck Off.
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 7,951

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 Isuzu Description

OBDII Code P0751 Isuzu - 1-2 Shift Solenoid Stuck Off - AutoCodes.com — P0751 Isuzu Code - 1-2 Shift Solenoid Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0751 Isuzu?

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 Isuzu?

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 Isuzu 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 Isuzu Code

1. What does OBDII code P0751 in Isuzu vehicles indicate?

The P0751 code in Isuzu vehicles indicates a problem with the 1-2 Shift Solenoid being stuck off, affecting the transmission's ability to shift gears properly.

2. What are the common symptoms of a P0751 OBDII code in an Isuzu?

Common symptoms of a P0751 OBDII code in Isuzu vehicles include harsh shifting, delayed or erratic shifting, transmission slipping, and the transmission getting stuck in one gear.

3. What are the possible causes of the P0751 OBDII code in Isuzu vehicles?

Possible causes of the P0751 code in Isuzu vehicles include a faulty 1-2 Shift Solenoid, wiring issues, low transmission fluid level, dirty transmission fluid, or a problem with the transmission control module.

4. How can I diagnose the P0751 OBDII code in my Isuzu?

Diagnosing the P0751 code in your Isuzu involves using an OBDII scanner to retrieve the code, conducting a visual inspection of the transmission wiring and connections, checking the transmission fluid level and condition, and performing a solenoid resistance test.

5. Can I continue driving my Isuzu with a P0751 OBDII code?

It is not recommended to continue driving your Isuzu with a P0751 OBDII code, as it can lead to further transmission damage and potential safety hazards. It is best to address the issue promptly.

6. How can I repair a P0751 OBDII code in my Isuzu?

Repairing a P0751 OBDII code in your Isuzu may involve replacing the 1-2 Shift Solenoid, repairing or replacing damaged wiring, ensuring proper transmission fluid levels and quality, or reprogramming the transmission control module.

7. Is it necessary to visit a mechanic for a P0751 OBDII code in my Isuzu?

While some DIY enthusiasts may be able to address the P0751 code themselves, it is recommended to consult a qualified mechanic or technician for a proper diagnosis and repair to ensure the issue is resolved correctly.

8. How much does it cost to repair a P0751 OBDII code in an Isuzu?

The cost of repairing a P0751 OBDII code in an Isuzu can vary depending on the underlying cause, parts needed, labor charges, and the mechanic's rates. It is advisable to obtain multiple quotes from reputable repair shops.

9. Can a P0751 OBDII code be prevented in Isuzu vehicles?

Regular maintenance of the transmission, including checking and changing the transmission fluid as recommended, can help prevent issues like the P0751 code in Isuzu vehicles. Additionally, addressing any transmission problems promptly can prevent further damage.

10. How long does it take to repair a P0751 OBDII code in an Isuzu?

The time required to repair a P0751 OBDII code in an Isuzu can vary based on the specific issue, availability of parts, and the mechanic's workload. In general, it may take a few hours to a full day to diagnose and repair the problem.