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P0750 Infiniti Code - Shift Control Solenoid 'A' Malfunction

Quick Answer

The P0750 Infiniti code indicates a malfunction with the Shift Control Solenoid 'A' in the transmission. Common causes include Faulty shift control solenoid 'A', Wiring issues or electrical connections, Low transmission fluid levels or dirty 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
P0750 Infiniti indicates Shift Control Solenoid 'A' Malfunction.
Common causes
Common causes include Faulty shift control solenoid 'A', Wiring issues or electrical connections, Low transmission fluid levels or dirty 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 07, 2024
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Code P0750 Infiniti Description

The P0750 Infiniti code indicates a malfunction with the Shift Control Solenoid 'A' in the transmission. The shift control solenoid is responsible for controlling the flow of transmission fluid to engage the correct gear for the driving conditions. When this solenoid malfunctions, it can lead to issues with shifting gears smoothly and efficiently.

OBDII Code P0750 Infiniti - Shift Control Solenoid 'A' Malfunction
P0750 Infiniti Code - Shift Control Solenoid 'A' Malfunction

Common Causes of P0750 Infiniti

  1. Faulty shift control solenoid 'A'
  2. Wiring issues or electrical connections
  3. Low transmission fluid levels or dirty fluid
  4. Transmission control module failure
  5. Mechanical damage or wear in the transmission system

Symptoms of P0750 Infiniti

  1. Delayed or rough shifting between gears
  2. Slipping gears during acceleration
  3. Inability to shift into certain gears
  4. Illumination of the Check Engine Light
  5. Transmission fluid leaks or unusual noises

How to Fix P0750 Infiniti

  1. Begin by diagnosing the exact cause of the malfunction using a diagnostic scanner to retrieve the trouble code and perform further testing.
  2. Inspect the shift control solenoid 'A' and its wiring for any signs of damage or wear. Replace the solenoid if found faulty.
  3. Check the transmission fluid level and condition. Replace or top up the fluid if necessary.
  4. Test the transmission control module for proper functionality and replace if deemed defective.
  5. Clear the trouble code from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0750 Infiniti

The typical repair costs for addressing a Shift Control Solenoid 'A' Malfunction can range from $150 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's essential to factor in additional costs for diagnosis time and potential fluid replacement. As mentioned, labor rates can vary between auto repair shops, so it's recommended to inquire with local shops for a more accurate estimate.

What does this mean?

Tech Notes for P0750 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 P0750 code is detected when the 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 P0750 Infiniti Code

1. What does the OBDII code P0750 mean on an Infiniti?

P0750 indicates a malfunction in the shift control solenoid 'A,' which is responsible for controlling the flow of transmission fluid to manage gear shifting.

2. What are the common symptoms of a P0750 code on an Infiniti?

Symptoms may include harsh or delayed shifting, transmission stuck in one gear, poor acceleration, or the transmission going into "limp mode."

3. What causes the P0750 code on an Infiniti?

Common causes include a faulty shift solenoid 'A,' low transmission fluid levels, dirty or contaminated transmission fluid, wiring issues, or a failing transmission control module (TCM).

4. Can low transmission fluid trigger the P0750 code?

Yes, low or dirty transmission fluid can affect the operation of the shift solenoid and trigger the P0750 code.

5. How do you diagnose the P0750 code on an Infiniti?

Diagnosis typically involves checking the transmission fluid level and condition, inspecting the solenoid wiring and connectors, testing the solenoid's electrical resistance, and performing a scan for related codes.

6. Can you drive an Infiniti with the P0750 code?

It is not recommended to drive for extended periods with this code, as it can lead to further transmission damage or unsafe driving conditions.

7. How is the P0750 code fixed on an Infiniti?

Repairs may include replacing the shift solenoid 'A,' flushing and refilling the transmission fluid, repairing damaged wiring or connectors, or updating/replacing the transmission control module.

8. How much does it cost to fix the P0750 code on an Infiniti?

The repair cost can vary widely but typically ranges from $150 to $400 for solenoid replacement and fluid service. More extensive repairs, like TCM replacement, can cost significantly more.

9. Can a faulty TCM cause the P0750 code on an Infiniti?

Yes, a malfunctioning transmission control module can cause improper solenoid operation, leading to the P0750 code.

10. Is it necessary to reprogram the TCM after fixing the P0750 code?

In some cases, reprogramming the TCM may be required after replacing components to ensure proper operation and clearing of the code.

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