AutoCodes – Nissan – P17B4 Nissan

P17B4 Nissan 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 Nissan 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.

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Code Popularity 1,980

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
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Code P17B4 Nissan 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 Nissan - Low Brake Solenoid - AutoCodes.com — P17B4 Nissan Code - Low Brake Solenoid

What does this mean?

What are the Possible Causes of the DTC P17B4 Nissan?

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 Nissan?

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 Nissan 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 Nissan code?

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

Need Help with the Code?

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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 P17B4 Nissan Code

1. What does the OBDII code P17B4 mean on a Nissan?

P17B4 indicates a "Low Brake Solenoid" issue, which often relates to a problem in the transmission or brake system where the solenoid is not functioning as expected.

2. What are the common symptoms of the P17B4 code?

Symptoms may include transmission shifting issues, a lit check engine light, poor acceleration, and, in some cases, reduced braking performance.

3. What causes the P17B4 code to appear?

Common causes include a faulty brake solenoid, damaged wiring or connectors in the solenoid circuit, low transmission fluid, or a malfunction in the transmission control module (TCM).

4. How do I diagnose the P17B4 code on my Nissan?

Diagnosing this code typically involves checking the solenoid and its wiring for damage, inspecting fluid levels for contamination or low levels, and using a scan tool to monitor the solenoid's operation.

5. Can I drive my Nissan with the P17B4 code active?

Driving with this code is not recommended, as it can lead to further transmission or brake system damage and may compromise vehicle safety.

6. How do I fix the P17B4 code on a Nissan?

Repairs may include replacing the faulty solenoid, repairing damaged wiring or connectors, flushing and refilling the transmission fluid, or reprogramming or replacing the TCM if necessary.

7. What tools are needed to troubleshoot the P17B4 code?

You will need an OBDII scan tool, a multimeter for testing electrical circuits, and potentially tools for accessing and replacing the solenoid.

8. Is the P17B4 code related to the transmission or brake system?

The code is primarily associated with the transmission system but can also affect braking performance due to its connection to the low brake solenoid.

9. How much does it cost to fix the P17B4 code on a Nissan?

Repair costs vary depending on the issue, ranging from $150 for simple wiring repairs to $1,000 or more if the solenoid or TCM requires replacement.

10. Can low transmission fluid cause the P17B4 code?

Yes, low or contaminated transmission fluid can cause the P17B4 code by affecting the solenoid's operation. Always check and maintain proper fluid levels.