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P1774 2004 Infiniti G35 Code - Low Coast Brake Solenoid Valve Function

Quick Answer

The P1774 diagnostic trouble code for a 2004 Infiniti G35 specifically relates to the Low Coast Brake Solenoid Valve Function. Common causes include Faulty low coast brake solenoid valve, Wiring or electrical issues, Low transmission fluid levels. 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 2004 Infiniti G35 indicates Low Coast Brake Solenoid Valve Function.
Common causes
Common causes include Faulty low coast brake solenoid valve, Wiring or electrical issues, Low transmission fluid levels.
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 Sep 10, 2024
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Code P1774 2004 Infiniti G35 Description

The P1774 diagnostic trouble code for a 2004 Infiniti G35 specifically relates to the Low Coast Brake Solenoid Valve Function. This code indicates a malfunction in the solenoid valve responsible for controlling the transmission's low coast brake function. The low coast brake solenoid valve is a critical component in the transmission system that helps regulate the application of the low coast brake, which assists in slowing down the vehicle during certain driving conditions.

OBDII Code P1774 2004 Infiniti G35 - Low Coast Brake Solenoid Valve Function
P1774 2004 Infiniti G35 Code - Low Coast Brake Solenoid Valve Function

Common Causes of P1774 2004 Infiniti G35

  1. Faulty low coast brake solenoid valve
  2. Wiring or electrical issues
  3. Low transmission fluid levels
  4. Transmission control module malfunction
  5. Mechanical damage to the transmission components

Symptoms of P1774 2004 Infiniti G35

  1. Erratic shifting patterns
  2. Harsh or delayed gear changes
  3. Difficulty in downshifting
  4. Limp mode activation
  5. Loss of low coast brake function

How to Fix P1774 2004 Infiniti G35

  1. Diagnose the code using a professional OBD-II scanner to confirm the issue with the low coast brake solenoid valve.
  2. Inspect the wiring and electrical connections related to the solenoid valve for any damage or corrosion.
  3. Check the transmission fluid levels and quality, topping up or replacing if necessary.
  4. Replace the faulty low coast brake solenoid valve with a new one, ensuring proper installation and calibration.
  5. Clear the error code and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P1774 2004 Infiniti G35

The typical repair costs for addressing a P1774 code on a 2004 Infiniti G35 can range from $200 to $500, including parts and labor. However, it's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It is recommended to obtain local quotes for a more accurate estimate of the repair costs.

What does this mean?

Tech Notes for P1774 2004 Infiniti G35

There is a Factory Service Bulletin for the 2004 Infiniti G35 with 5-Speed A/T RE5R05A Transmission:

2004 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 2004 Infiniti G35 Code

1. What are the common symptoms of OBDII code P1774 in a 2004 Infiniti G35?

The common symptoms of OBDII code P1774 in a 2004 Infiniti G35 include harsh shifting, transmission slipping, and decreased fuel efficiency.

2. What does the Low Coast Brake Solenoid Valve do in a 2004 Infiniti G35?

The Low Coast Brake Solenoid Valve in a 2004 Infiniti G35 is responsible for controlling the transmission fluid pressure during gear changes to ensure smooth shifting.

3. What are the possible causes of OBDII code P1774 in a 2004 Infiniti G35?

Possible causes of OBDII code P1774 in a 2004 Infiniti G35 include a faulty low coast brake solenoid valve, damaged wiring or connectors, low transmission fluid, or internal transmission issues.

4. How can I diagnose the Low Coast Brake Solenoid Valve issue in my 2004 Infiniti G35?

Diagnosing the Low Coast Brake Solenoid Valve issue in a 2004 Infiniti G35 involves checking the transmission fluid level, inspecting the wiring and connectors for damage, and performing a scan with an OBDII scanner to retrieve the error code.

5. Can I continue to drive my 2004 Infiniti G35 with OBDII code P1774?

It is not recommended to continue driving your 2004 Infiniti G35 with OBDII code P1774 as it can lead to further transmission damage and potential safety hazards.

6. How much does it typically cost to repair OBDII code P1774 in a 2004 Infiniti G35?

The cost to repair OBDII code P1774 in a 2004 Infiniti G35 can vary depending on the exact cause of the issue, but it typically ranges from $200 to $600 including parts and labor.

7. Can I repair OBDII code P1774 in my 2004 Infiniti G35 myself?

While some DIY enthusiasts may attempt to repair OBDII code P1774 in a 2004 Infiniti G35, it is recommended to consult a professional mechanic due to the complexity of transmission system repairs.

8. Will resetting the OBDII code P1774 in my 2004 Infiniti G35 fix the issue?

Simply resetting the OBDII code P1774 in a 2004 Infiniti G35 will not fix the underlying problem with the Low Coast Brake Solenoid Valve. It is important to diagnose and repair the root cause of the issue.

9. How long does it take to repair OBDII code P1774 in a 2004 Infiniti G35?

The repair time for OBDII code P1774 in a 2004 Infiniti G35 can vary depending on the extent of the issue, but it typically takes a few hours to a full day for a professional mechanic to diagnose and fix the problem.

10. Is OBDII code P1774 a common issue in 2004 Infiniti G35 vehicles?

While OBDII code P1774 related to the Low Coast Brake Solenoid Valve function is not extremely common in 2004 Infiniti G35 vehicles, it can still occur due to various factors affecting the transmission system.

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