AutoCodes – Infiniti – P1772 Infiniti

P1772 Infiniti Code - Low Coast Brake Solenoid Valve

Quick Answer

Low coast brake solenoid valve is turned “ON” or “OFF” by the Transmission Control Module (TCM) in response to signals sent from the PNP switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Common causes include Faulty Low Coast Brake Solenoid Valve, Low Coast Brake Solenoid Valve harness is open or shorted, Low Coast Brake Solenoid Valve 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: P1772 Infiniti indicates Low Coast Brake Solenoid Valve.
Common causes: Common causes include Faulty Low Coast Brake Solenoid Valve, Low Coast Brake Solenoid Valve harness is open or shorted, Low Coast Brake Solenoid Valve 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 24,287

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 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1772 Infiniti Description

OBDII Code P1772 Infiniti - Low Coast Brake Solenoid Valve - AutoCodes.com — P1772 Infiniti Code - Low Coast Brake Solenoid Valve

What does this mean?

What are the Possible Causes of the DTC P1772 Infiniti?

Faulty Low Coast Brake Solenoid Valve
Low Coast Brake Solenoid Valve harness is open or shorted
Low Coast Brake Solenoid Valve circuit poor electrical connection

How to Fix the DTC P1772 Infiniti?

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 P1772 Infiniti 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 P1772 Infiniti code?

Need more information on how to fix the P1772 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1772 Infiniti code diagnosed by a professional: Find a repair shop in your area

Information for Specific Infiniti Models

P1772 2003 Infiniti G35 — Low Coast Brake Solenoid Valve
P1772 2004 Infiniti G35 — Low Coast Brake Solenoid Valve
P1772 2005 Infiniti G35 — Low Coast Brake Solenoid Valve
P1772 2006 Infiniti G35 — Low Coast Brake Solenoid Valve

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.