AutoCodes – Infiniti – P17B4 Infiniti

P17B4 Infiniti Code - Low Brake Solenoid

Quick Answer

The Transmission Control Module (TCM) monitors the Low Brake Solenoid. Common causes include Faulty Low Brake Solenoid, Low Brake Solenoid harness is open or shorted, Low Brake Solenoid 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: P17B4 Infiniti indicates Low Brake Solenoid.
Common causes: Common causes include Faulty Low Brake Solenoid, Low Brake Solenoid harness is open or shorted, Low Brake Solenoid 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 846

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 Jan 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P17B4 Infiniti Description

The Transmission Control Module (TCM) monitors the Low Brake Solenoid. The TCM sets the OBDII code when the Low Brake Solenoid is not to factory specifications.

OBDII Code P17B4 Infiniti - Low Brake Solenoid - AutoCodes.com — P17B4 Infiniti Code - Low Brake Solenoid

What does this mean?

What are the Possible Causes of the DTC P17B4 Infiniti?

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

How to Fix the DTC P17B4 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 P17B4 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 P17B4 Infiniti code?

Need more information on how to fix the P17B4 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P17B4 Infiniti code diagnosed by a professional: Find a repair shop in your area

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 P17B4 Infiniti Code

1. What does the OBDII code P17B4 mean on an Infiniti?

P17B4 indicates a "Low Brake Solenoid" issue, meaning the transmission control module has detected a problem with the brake solenoid's operation or performance.

2. What are the common symptoms of the P17B4 code in an Infiniti?

Symptoms may include transmission slipping, harsh shifting, reduced vehicle performance, or the illumination of the check engine light.

3. What causes the P17B4 code to appear on an Infiniti?

The code can be triggered by a faulty brake solenoid, low transmission fluid levels, damaged wiring, or issues with the transmission control module (TCM).

4. Can driving with the P17B4 code damage my Infiniti?

Yes, driving with this code can lead to further transmission damage or unsafe driving conditions if the solenoid fails to operate correctly.

5. How can I fix the P17B4 code on my Infiniti?

Start by checking the transmission fluid level and condition. If the fluid is fine, inspect the brake solenoid and related wiring for damage. A faulty solenoid may require replacement.

6. How much does it cost to fix the P17B4 code on an Infiniti?

Repair costs can range from $150 to $500, depending on whether the issue is with the solenoid, wiring, or TCM. Labor rates and parts availability may also affect the cost.

7. Can a low transmission fluid level cause the P17B4 code?

Yes, low or contaminated transmission fluid can affect solenoid performance and trigger this code.

8. How do I know if the brake solenoid is faulty on my Infiniti?

A diagnostic scan, combined with a solenoid resistance test and visual inspection of the wiring, can confirm if the brake solenoid is faulty.

9. Can I reset the P17B4 code without repairs?

Clearing the code without addressing the underlying issue may result in the code returning and potential further damage to the transmission.

10. Is the P17B4 code specific to Infiniti vehicles?

While it is common on Infiniti models, the code can also appear on other vehicles with similar transmission systems, but the exact diagnosis and repair steps may vary.