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P1774 2006 Infiniti G35 Code - Low Coast Brake Solenoid Valve Function

Quick Answer

The P1774 diagnostic trouble code for a 2006 Infiniti G35 relates to the Low Coast Brake Solenoid Valve Function. Common causes include Faulty low coast brake solenoid valve, Electrical issues in the solenoid circuit, Fluid contamination in the transmission system. 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
P1774 2006 Infiniti G35 indicates Low Coast Brake Solenoid Valve Function.
Common causes
Common causes include Faulty low coast brake solenoid valve, Electrical issues in the solenoid circuit, Fluid contamination in the transmission system.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 18, 2024
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Code P1774 2006 Infiniti G35 Description

The P1774 diagnostic trouble code for a 2006 Infiniti G35 relates to the Low Coast Brake Solenoid Valve Function. This code specifically indicates that there is an issue with the solenoid valve responsible for controlling the low coast brake function in the transmission system. The low coast brake solenoid valve plays a crucial role in maintaining the proper operation of the transmission, especially during coasting or deceleration. When this valve malfunctions, it can lead to erratic transmission behavior, decreased fuel efficiency, and potential long-term damage to the transmission system if left unaddressed.

OBDII Code P1774 2006 Infiniti G35 - Low Coast Brake Solenoid Valve Function
P1774 2006 Infiniti G35 Code - Low Coast Brake Solenoid Valve Function

Common Causes of P1774 2006 Infiniti G35

  1. Faulty low coast brake solenoid valve
  2. Electrical issues in the solenoid circuit
  3. Fluid contamination in the transmission system
  4. Wiring harness damage
  5. Mechanical issues within the transmission

Symptoms of P1774 2006 Infiniti G35

  1. Rough shifting between gears
  2. Delayed engagement when shifting into gear
  3. Transmission slipping
  4. Reduced fuel efficiency
  5. Illuminated Check Engine Light

How to Fix P1774 2006 Infiniti G35

  1. Begin by diagnosing the specific cause of the P1774 code using a professional diagnostic scan tool.
  2. Inspect the low coast brake solenoid valve for any signs of damage or malfunction.
  3. Check the wiring harness and electrical connections related to the solenoid valve for any issues.
  4. If necessary, replace the faulty low coast brake solenoid valve with a new one.
  5. Clear the trouble code and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P1774 2006 Infiniti G35

The cost of repairing a P1774 code on a 2006 Infiniti G35 can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts for a solenoid valve replacement may range from $100 to $300, while labor costs can add another $100 to $200. Therefore, the total repair cost could be anywhere from $200 to $500. It's important to note that these estimates are rough averages and actual costs may differ based on individual circumstances.

What does this mean?

Tech Notes for P1774 2006 Infiniti G35

There is a Factory Service Bulletin for the 2006 Infiniti G35 with 5-Speed A/T RE5R05A Transmission:
2006 Infiniti G35 RE5R05A Transmission Factory Service Bulletin OBDII Code P1774

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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 P1774 2006 Infiniti G35 Code

1. What are common symptoms of OBDII code P1774 in a 2006 Infiniti G35?

Common symptoms include harsh shifting, transmission slipping, and the vehicle going into "limp mode," where it may be stuck in one gear.

2. What does the Low Coast Brake Solenoid Valve do in a 2006 Infiniti G35?

The Low Coast Brake Solenoid Valve controls the application of hydraulic pressure to the low coast brake in the transmission, helping with shifting and performance.

3. What are possible causes of OBDII code P1774 in a 2006 Infiniti G35?

Possible causes include a faulty low coast brake solenoid valve, wiring issues, low transmission fluid, or a malfunctioning transmission control module.

4. Can I continue driving my 2006 Infiniti G35 with OBDII code P1774?

It is not recommended to continue driving with this code present, as it can lead to further transmission issues and potential safety hazards.

5. How can I diagnose the Low Coast Brake Solenoid Valve issue in my 2006 Infiniti G35?

Diagnosis typically involves a scan tool to retrieve the OBDII code, checking the transmission fluid level and condition, and inspecting the wiring and connections to the solenoid valve.

6. What are some repair options for fixing OBDII code P1774 in a 2006 Infiniti G35?

Repair options may include replacing the low coast brake solenoid valve, repairing any damaged wiring, ensuring proper transmission fluid levels, or reprogramming the transmission control module.

7. How much does it cost to repair OBDII code P1774 in a 2006 Infiniti G35?

The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. Can a DIY enthusiast fix OBDII code P1774 in a 2006 Infiniti G35?

While some experienced DIY enthusiasts may attempt to diagnose and repair this issue, it is recommended to consult a professional mechanic or technician due to the complexity of transmission systems.

9. Will resetting the OBDII code P1774 in my 2006 Infiniti G35 make the problem go away?

Simply resetting the code without addressing the underlying issue will not fix the problem. It is important to diagnose and repair the root cause to prevent further transmission damage.

10. How often does the Low Coast Brake Solenoid Valve fail in a 2006 Infiniti G35?

The failure rate of the low coast brake solenoid valve can vary, but it is not uncommon for this component to fail over time, especially in older vehicles or those with high mileage.

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