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P0780 Infiniti Code - Shift Control System Fault

Quick Answer

The P0780 code in Infiniti vehicles indicates a shift control system fault. Common causes include Faulty shift solenoids, Malfunctioning transmission control module (TCM), Low transmission fluid levels. 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
P0780 Infiniti indicates Shift Control System Fault.
Common causes
Common causes include Faulty shift solenoids, Malfunctioning transmission control module (TCM), Low transmission fluid levels.
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 08, 2024
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Code P0780 Infiniti Description

The P0780 code in Infiniti vehicles indicates a shift control system fault. This means that there is an issue with the vehicle's ability to shift gears properly, which can lead to a variety of problems with the transmission and overall performance of the vehicle. The shift control system is responsible for managing the transmission's gear shifts, ensuring smooth acceleration and deceleration, and maintaining optimal fuel efficiency. When this system malfunctions, it can result in rough shifting, delayed gear changes, or even complete transmission failure.

OBDII Code P0780 Infiniti - Shift Control System Fault
P0780 Infiniti Code - Shift Control System Fault

Common Causes of P0780 Infiniti

  1. Faulty shift solenoids
  2. Malfunctioning transmission control module (TCM)
  3. Low transmission fluid levels
  4. Electrical issues within the shift control system
  5. Mechanical problems within the transmission

Symptoms of P0780 Infiniti

  1. Rough or delayed shifting between gears
  2. Slipping gears during acceleration or deceleration
  3. Difficulty shifting into certain gears
  4. Illumination of the check engine light
  5. Reduced fuel efficiency or performance

How to Fix P0780 Infiniti

  1. Diagnose the specific cause of the shift control system fault by using a scan tool to retrieve the trouble codes and conducting a visual inspection of the transmission components.
  2. Check the transmission fluid level and condition, topping off or replacing it if necessary.
  3. Inspect the shift solenoids and TCM for any signs of damage or malfunction, replacing them as needed.
  4. Test the electrical connections within the shift control system to ensure proper communication and functionality.
  5. Clear the trouble codes, reset the TCM, and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P0780 Infiniti

The typical repair costs for a shift control system fault in an Infiniti vehicle can range from $200 to $800, depending on the specific cause of the issue and the extent of the repairs needed. This estimate includes the cost of parts and labor, but it's important to note that prices can vary based on factors such as location, vehicle make and model, and the level of expertise of the auto repair shop. Additionally, diagnosis time and labor rates can also impact the final cost, with rates typically ranging between $80 and $150 per hour. It's recommended to obtain quotes from multiple reputable auto repair shops to ensure the best possible price for the necessary repairs.

When is the Code Detected?

The P0780 codes is detected when no rotation change occurs between input (turbine revolution sensor) and output (revolution sensor) and shifting time is long or when shifting ends immediately or when engine revs up unusually during shifting.

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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.

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