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P1772 Infiniti Code - Low Coast Brake Solenoid Valve

Quick Answer

The P1772 Infiniti diagnostic trouble code refers to a potential issue with the Low Coast Brake Solenoid Valve in the vehicle. Common causes include Faulty low coast brake solenoid valve, Electrical issues or wiring problems, 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
P1772 Infiniti indicates Low Coast Brake Solenoid Valve.
Common causes
Common causes include Faulty low coast brake solenoid valve, Electrical issues or wiring problems, 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 07, 2024
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Code P1772 Infiniti Description

The P1772 Infiniti diagnostic trouble code refers to a potential issue with the Low Coast Brake Solenoid Valve in the vehicle. This valve is a crucial component of the transmission system, responsible for controlling the application of the brakes during the coasting phase of the vehicle. When this solenoid valve malfunctions or fails to operate properly, it can lead to significant performance issues and potentially cause long-term damage to the vehicle if left unaddressed.

OBDII Code P1772 Infiniti - Low Coast Brake Solenoid Valve
P1772 Infiniti Code - Low Coast Brake Solenoid Valve

Common Causes of P1772 Infiniti

  1. Faulty low coast brake solenoid valve
  2. Electrical issues or wiring problems
  3. Low transmission fluid levels
  4. Contamination of transmission fluid
  5. Mechanical damage to the transmission system

Symptoms of P1772 Infiniti

  1. Erratic shifting or harsh gear changes
  2. Transmission slipping
  3. Delayed engagement when shifting gears
  4. Illumination of the check engine light
  5. Decreased fuel efficiency

How to Fix P1772 Infiniti

  1. Begin by performing a thorough diagnostic scan to confirm the P1772 code and identify the specific issue with the low coast brake solenoid valve.
  2. Inspect the wiring and electrical connections related to the solenoid valve to ensure there are no loose connections or damaged wires.
  3. Check the transmission fluid levels and condition, topping off or replacing the fluid if necessary.
  4. Test the solenoid valve to determine if it is functioning correctly, replacing it if it is found to be faulty.
  5. Clear the diagnostic trouble code from the vehicle's system and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1772 Infiniti

The typical repair costs for addressing a P1772 Infiniti code related to the low coast brake solenoid valve can vary depending on the extent of the issue and the specific repairs needed. On average, the parts for this repair can range from $100 to $300, with labor costs adding an additional $150 to $300. Overall, the total repair cost for this issue can range from $250 to $600. It's important to note that these costs are estimates and can vary based on factors such as location, vehicle make and model, and the specific diagnosis time and labor rates at auto repair shops. It's recommended to check with local shops for a more accurate estimate of repair costs.

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Information for Specific Infiniti Models

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 P1772 Infiniti Code

1. What does the OBDII code P1772 mean in an Infiniti vehicle?

P1772 indicates a problem with the Low Coast Brake Solenoid Valve, which is part of the transmission control system responsible for managing gear shifts.

2. What are the common symptoms of a P1772 code in an Infiniti?

Symptoms may include harsh or delayed shifting, the transmission being stuck in one gear, poor fuel efficiency, and the check engine light or transmission warning light being illuminated.

3. What causes the P1772 code to appear in an Infiniti?

Common causes include a faulty Low Coast Brake Solenoid Valve, damaged wiring or connectors, a malfunctioning transmission control module (TCM), or low transmission fluid levels.

4. Can I drive my Infiniti with a P1772 code?

Driving with a P1772 code is not recommended, as it can lead to further transmission damage or unsafe driving conditions due to shifting issues.

5. How is the P1772 code diagnosed in an Infiniti?

A technician will use a scan tool to confirm the code, inspect the wiring and connectors for damage, test the Low Coast Brake Solenoid Valve, and check the transmission fluid level and condition.

6. What repairs are needed to fix the P1772 code?

Repairs may include replacing the Low Coast Brake Solenoid Valve, repairing damaged wiring or connectors, replacing the TCM if faulty, or performing a transmission fluid flush and refill.

7. How much does it cost to fix the P1772 code in an Infiniti?

Repair costs can vary widely but may range from $150 to $500 or more, depending on whether the solenoid, wiring, or TCM needs replacement and the labor involved.

8. Can low transmission fluid cause the P1772 code?

Yes, low or contaminated transmission fluid can affect the performance of the solenoid valve and trigger the P1772 code.

9. Is the P1772 code specific to Infiniti vehicles?

While P1772 is commonly associated with Infiniti vehicles, it can also appear in other Nissan models with similar transmission systems.

10. Will clearing the P1772 code with a scan tool fix the issue?

Clearing the code will only temporarily turn off the warning light. The underlying issue must be diagnosed and repaired to prevent the code from returning.

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