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P0755 Infiniti Code - Shift Control Solenoid 'B' Malfunction

Quick Answer

The P0755 Infiniti diagnostic trouble code indicates a malfunction in the Shift Control Solenoid 'B' in the transmission system of the vehicle. Common causes include Faulty shift control solenoid 'B', Low transmission fluid level, Clogged transmission filter. 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
P0755 Infiniti indicates Shift Control Solenoid 'B' Malfunction.
Common causes
Common causes include Faulty shift control solenoid 'B', Low transmission fluid level, Clogged transmission filter.
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 12, 2024
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Code P0755 Infiniti Description

The P0755 Infiniti diagnostic trouble code indicates a malfunction in the Shift Control Solenoid 'B' in the transmission system of the vehicle. The shift control solenoid is an essential component responsible for regulating the flow of transmission fluid to facilitate smooth gear shifting. When this solenoid malfunctions, it can disrupt the transmission's ability to shift gears effectively, leading to various performance issues.

OBDII Code P0755 Infiniti - Shift Control Solenoid 'B' Malfunction
P0755 Infiniti Code - Shift Control Solenoid 'B' Malfunction

Common Causes of P0755 Infiniti

  1. Faulty shift control solenoid 'B'
  2. Low transmission fluid level
  3. Clogged transmission filter
  4. Wiring issues or electrical problems
  5. Internal transmission damage

Symptoms of P0755 Infiniti

  1. Erratic or harsh shifting
  2. Delayed shifting
  3. Transmission slipping
  4. Illuminated check engine light
  5. Reduced fuel efficiency

How to Fix P0755 Infiniti

  1. Diagnose the specific cause of the P0755 code using a scan tool to identify the shift control solenoid 'B' malfunction.
  2. Inspect the transmission fluid level and condition, topping up or replacing fluid as necessary.
  3. Check the transmission filter for blockages or contaminants, replacing it if needed.
  4. Inspect the wiring harness and connectors for any damage or corrosion, repairing or replacing as necessary.
  5. Replace the shift control solenoid 'B' if it is found to be faulty, ensuring proper installation and testing the transmission's operation afterwards.

Cost to Fix P0755 Infiniti

The typical repair cost for addressing a shift control solenoid 'B' malfunction can range from $150 to $500, including parts and labor. However, actual costs may vary depending on the vehicle's make and model, the extent of the issue, and the repair shop's labor rates. It is advisable to consult with a professional technician or repair shop to obtain a more accurate estimate based on the specific circumstances.

What does this mean?

Tech Notes for P0755 Infiniti

When the a transmission solenoid is malfunction, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is very dirty, it is recommend changing the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical failure and that the transmission will need to be rebuilt or replaced.

When is the Code Detected?

The P0755 code is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.

Need more information about the P0755 Infiniti code?

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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 P0755 Infiniti Code

1. What are the common symptoms of OBDII code P0755 in an Infiniti related to Shift Control Solenoid 'B' Malfunction?

The common symptoms include harsh or delayed shifting, erratic transmission behavior, and the transmission staying in one gear.

2. What are the possible causes of OBDII code P0755 in an Infiniti?

The Shift Control Solenoid 'B' Malfunction in an Infiniti can be caused by a faulty shift solenoid, low transmission fluid level, a clogged transmission filter, or wiring issues.

3. How serious is the OBDII code P0755 in an Infiniti?

Ignoring OBDII code P0755 can lead to further damage to the transmission system, resulting in costly repairs. It is recommended to address the issue promptly.

4. Can I continue driving my Infiniti with OBDII code P0755 present?

It is not recommended to continue driving your Infiniti with OBDII code P0755, as it can cause further damage to the transmission system. It's best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose OBDII code P0755 in my Infiniti at home?

You can diagnose OBDII code P0755 by using an OBDII scanner to retrieve the trouble code, checking the transmission fluid level and condition, and inspecting the wiring connected to Shift Control Solenoid 'B'.

6. What are some repair tips for fixing OBDII code P0755 in an Infiniti?

Repair tips for resolving Shift Control Solenoid 'B' Malfunction include replacing the faulty shift solenoid, checking and replenishing the transmission fluid, and inspecting the wiring for any damage or loose connections.

7. How much does it cost to repair OBDII code P0755 in an Infiniti?

The cost of repairing OBDII code P0755 can vary depending on the root cause of the issue, the extent of the damage, and labor costs. It's advisable to get a diagnostic done by a professional to get an accurate estimate.

8. Can a DIY enthusiast fix OBDII code P0755 in an Infiniti?

While some simple tasks like checking the transmission fluid level can be done by a DIY enthusiast, diagnosing and repairing Shift Control Solenoid 'B' Malfunction may require specialized tools and expertise. It's recommended to seek professional help for this issue.

9. How long does it take to repair OBDII code P0755 in an Infiniti?

The repair time for OBDII code P0755 can vary depending on the exact cause of the issue, availability of parts, and the expertise of the mechanic. It's best to consult with a professional for a more accurate estimate of the repair time.

10. Can resetting the OBDII code P0755 in an Infiniti fix the issue?

Resetting the OBDII code may temporarily clear the warning light, but it will not fix the underlying problem causing Shift Control Solenoid 'B' Malfunction. It's important to address the root cause of the issue to prevent further transmission damage.

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