AutoCodes – Isuzu – P1739 Isuzu

P1739 Isuzu Code - Problem in 3rd Clutch Pressure Switch Circuit

Quick Answer

P1739 Isuzu indicates Problem in 3rd Clutch Pressure Switch Circuit. Common causes include Low transmission fluid level, 3rd Clutch Pressure Switch harness is open or shorted, 3rd Clutch Pressure Switch 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: P1739 Isuzu indicates Problem in 3rd Clutch Pressure Switch Circuit.
Common causes: Common causes include Low transmission fluid level, 3rd Clutch Pressure Switch harness is open or shorted, 3rd Clutch Pressure Switch 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 1,610

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 Sep 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1739 Isuzu Description

OBDII Code P1739 Isuzu - Problem in 3rd Clutch Pressure Switch Circuit - AutoCodes.com — P1739 Isuzu Code - Problem in 3rd Clutch Pressure Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P1739 Isuzu?

Low transmission fluid level
3rd Clutch Pressure Switch harness is open or shorted
3rd Clutch Pressure Switch circuit poor electrical connection
Faulty 3rd Clutch Pressure Switch

How to Fix the DTC P1739 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1739 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.

Need more information about the P1739 Isuzu 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 P1739 Isuzu Code

1. What are the common symptoms of OBDII code P1739 in an Isuzu related to the 3rd clutch pressure switch circuit?

- Common symptoms include harsh shifting, delayed engagement into gear, transmission slipping, and the transmission going into limp mode.

2. What can cause the OBDII code P1739 to trigger in an Isuzu?

- The code can be triggered by issues such as a faulty 3rd clutch pressure switch, damaged wiring or connectors in the circuit, low transmission fluid level, or internal transmission problems.

3. How does a faulty 3rd clutch pressure switch affect the transmission in an Isuzu?

- A faulty 3rd clutch pressure switch can lead to improper engagement of the 3rd gear, causing shifting problems, slipping, and potential damage to the transmission over time.

4. Can I drive my Isuzu with OBDII code P1739 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the transmission. It's advisable to address the issue promptly.

5. How can I diagnose and repair OBDII code P1739 related to the 3rd clutch pressure switch circuit in my Isuzu?

- Diagnosis typically involves checking the 3rd clutch pressure switch, inspecting the wiring and connectors for damage, ensuring proper transmission fluid levels, and addressing any internal transmission issues. Repair may involve replacing the pressure switch, repairing wiring, or performing transmission repairs.

6. Will resetting the OBDII code P1739 in my Isuzu make the problem go away?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not fixed, it is likely to return. It's important to diagnose and address the root cause of the problem.

7. How much does it cost to repair OBDII code P1739 in an Isuzu at a professional repair shop?

- The cost of repair can vary depending on the exact cause of the issue and the labor rates of the repair shop. Costs may include parts replacement, wiring repairs, and transmission service, potentially ranging from a few hundred to over a thousand dollars.

8. Are there any preventive maintenance steps to avoid OBDII code P1739 in an Isuzu?

- Regular transmission fluid changes, timely maintenance of the transmission system, and addressing any shifting issues promptly can help prevent problems like OBDII code P1739 from occurring in an Isuzu.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1739 in an Isuzu?

- Depending on the exact cause, a DIY enthusiast with proper tools and knowledge may be able to address some aspects of the repair, such as checking and replacing the pressure switch or repairing damaged wiring. However, more complex issues may require professional expertise.

10. Is OBDII code P1739 specific to Isuzu vehicles, or can it occur in other car brands?

- While the code description may vary slightly across different car manufacturers, similar issues related to the 3rd clutch pressure switch circuit can occur in other vehicles with automatic transmissions, not limited to Isuzu models.