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P0755 2002 Nissan Altima Sedan Code - Shift Control Solenoid 'B' Malfunction

Quick Answer

The P0755 diagnostic trouble code (DTC) for a 2002 Nissan Altima Sedan indicates a Shift Control Solenoid 'B' Malfunction. Common causes include Faulty shift control solenoid 'B', Low transmission fluid level, Contaminated transmission fluid. 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 2002 Nissan Altima Sedan indicates Shift Control Solenoid 'B' Malfunction.
Common causes
Common causes include Faulty shift control solenoid 'B', Low transmission fluid level, Contaminated transmission fluid.
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 17, 2024
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Code P0755 2002 Nissan Altima Sedan Description

The P0755 diagnostic trouble code (DTC) for a 2002 Nissan Altima Sedan indicates a Shift Control Solenoid 'B' Malfunction. This code specifically points to an issue with the transmission shift solenoid 'B', which is responsible for controlling the flow of transmission fluid to engage the appropriate gear for smooth shifting. When this solenoid malfunctions, it can lead to various transmission-related problems, affecting the vehicle's performance and drivability.

OBDII Code P0755 2002 Nissan Altima Sedan - Shift Control Solenoid 'B' Malfunction
P0755 2002 Nissan Altima Sedan Code - Shift Control Solenoid 'B' Malfunction

Common Causes of P0755 2002 Nissan Altima Sedan

  1. Faulty shift control solenoid 'B'
  2. Low transmission fluid level
  3. Contaminated transmission fluid
  4. Electrical issues or wiring problems
  5. Mechanical damage to the solenoid or transmission components

Symptoms of P0755 2002 Nissan Altima Sedan

  1. Erratic shifting behavior
  2. Harsh or delayed shifting
  3. Inability to shift gears
  4. Poor acceleration
  5. Reduced fuel efficiency

How to Fix P0755 2002 Nissan Altima Sedan

  1. Diagnose the issue by performing a transmission scan to confirm the P0755 code and identify the specific cause of the malfunction.
  2. Inspect the shift control solenoid 'B' for any visible damage or signs of wear, and test its electrical connections for proper functionality.
  3. Replace the faulty shift control solenoid 'B' with a new, OEM-quality solenoid to ensure proper operation.
  4. Flush and refill the transmission fluid to the recommended level and quality to prevent further issues related to fluid contamination or low levels.
  5. Clear the DTC from the vehicle's computer system and test drive the vehicle to ensure that the shifting behavior has been corrected.

Cost to Fix P0755 2002 Nissan Altima Sedan

The typical repair costs for addressing a Shift Control Solenoid 'B' Malfunction (P0755) in a 2002 Nissan Altima Sedan can range from $200 to $500, including parts and labor. However, it's important to note that the actual cost may vary depending on the specific diagnosis time, labor rates, and the price of the replacement solenoid at auto repair shops. Rates can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local repair shops for a more accurate estimate based on your specific circumstances. Labor rates at auto repair shops typically range between $80 and $150 per hour, with rates potentially higher at dealerships or in metropolitan areas, and lower at independent shops.

What does this mean?

Tech Notes for P0755 2002 Nissan Altima Sedan

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.

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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 2002 Nissan Altima Sedan Code

1. What does the OBDII code P0755 mean on a 2002 Nissan Altima?

P0755 indicates a malfunction in the Shift Solenoid 'B' circuit, which is responsible for controlling gear shifts within the transmission.

2. What are the common symptoms of a P0755 code in a 2002 Nissan Altima?

Symptoms may include harsh shifting, failure to shift gears, the vehicle being stuck in limp mode, decreased fuel efficiency, and the check engine light being on.

3. What causes the P0755 code in a 2002 Nissan Altima?

Common causes include a faulty shift solenoid 'B,' damaged wiring or connectors in the solenoid circuit, low or dirty transmission fluid, or internal transmission failures.

4. Can I drive my 2002 Nissan Altima with a P0755 code?

It’s not recommended to drive with this code as it can lead to further transmission damage or unsafe driving conditions due to erratic shifting.

5. How do I diagnose the P0755 code in my 2002 Nissan Altima?

You can start by using an OBDII scanner to confirm the code, inspecting the shift solenoid wiring and connectors for damage, checking the transmission fluid condition, and testing the solenoid for proper operation.

6. How can I fix the P0755 code in a 2002 Nissan Altima?

Repairs may include replacing the shift solenoid 'B,' repairing or replacing damaged wiring or connectors, flushing and refilling the transmission fluid, or addressing internal transmission issues.

7. How much does it cost to fix the P0755 code on a 2002 Nissan Altima?

The repair cost depends on the issue. Replacing a shift solenoid typically costs $150–$400, while transmission fluid servicing may cost $100–$200. More extensive repairs can cost significantly more.

8. Can dirty transmission fluid cause a P0755 code?

Yes, dirty or low transmission fluid can cause the solenoid to malfunction, leading to the P0755 code.

9. Where is the shift solenoid 'B' located in a 2002 Nissan Altima?

Shift solenoid 'B' is located inside the transmission valve body, which requires removal of the transmission pan to access.

10. Will resetting the check engine light fix the P0755 code?

Resetting the light will not fix the underlying issue. The root cause of the malfunction needs to be repaired to prevent the code from returning.

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