P1777 Nissan Code: A Practical Repair Guide

Dealing with a P1777 code in your Nissan can be frustrating. Do not fret! – In this guide, we’ll walk you through simple steps to tackle the issue. We’ll cover needed tools, explain the repair process, and discuss DIY feasibility. 

This empowers both DIYers and those seeking professional help to make informed decisions and potentially save on repairs.

Let’s find out!

P1777 Nissan Code: A Quick Overview

Check the summary of the P1777 Nissan code below!

  • Definition: Step Motor Circuit
  • Severity: Medium
  • DIY Skill Level: Intermediate
  • Continue To Drive?: Yes
  • Estimated Repair Cost: $20 – $200

What Is The Meaning Of The P1777 Nissan Code?

The P1777 Nissan code is a manufacturer-specific trouble code for Nissan vehicles. It indicates a specific concern within the step motor circuit of the automatic transmission. This code is triggered when any of the coils in the step motor fail to energize correctly, often due to an open circuit or a short circuit issue. While the vehicle might remain drivable with this code present, it highlights a potentially significant problem in the transmission system.

P1777 Nissan code is triggered
The P1777 is triggered when any of the coils in the step motor fail to energize correctly in Nissan cars.
(Credit: nissanclub.com)

The step motor, also called a stepper motor, is crucial for converting pulsing electrical currents into controlled parts rotation. This helps control different mechanical parts within Nissan transmissions effectively. 

This part operates through a unique mechanism involving the activation and deactivation of four coils. These coils are turned on and off based on signals received from the Transmission Control Module (TCM). By accurately translating electrical signals into these controlled movements, the step motor ensures the smooth operation and efficiency of the transmission system in Nissan vehicles.

The P1777 code has been reported in various Nissan models, potentially affecting the transmission performance across the following vehicles: Altima, Sentra, Maxima, Rogue (2009), Murano, Pathfinder, Versa (2007), Juke, Cube, etc.

How Severe Is Code P1777 Nissan? 

The severity of the P1777 code in Nissan vehicles can be classified as moderate. It may be possible to continue driving the vehicle.

While driving at a safe speed might be viable, it’s important to understand that ignoring the code could result in further damage to the transmission over time. This could lead to issues like harsh shifting and delayed gear engagement, potentially affecting the vehicle’s drivability and overall performance. It’s recommended to address the issue promptly to ensure the vehicle’s safety and longevity by consulting a professional mechanic and seeking necessary repairs.

What Are The Symptoms Of The P1777 Nissan Codes?

The P1777 code in Nissan vehicles can manifest through various noticeable symptoms, indicating potential issues with the step motor circuit. Common symptoms include:

  • Harsh or erratic shifting
  • Delayed gear engagement
  • Poor transmission performance
  • Weak acceleration
  • Check engine light illuminated

Read more: P1715 Nissan Code: Tips For Dealing With Transmission Issues

What Are The Causes Of The P1777 Nissan Code? 

The P1777 code can arise due to several underlying causes. Possible factors include:

  • Faulty step motor (stepper motor)
  • Wiring or connector issues in the step motor circuit

How To Diagnose And Fix The P1777 Nissan Code?

When you encounter the P1777 code in your Nissan vehicle, it’s important to follow a clear process for diagnosis and repair. Here’s a simple breakdown of the tools and a step-by-step guide you need, along with a discussion of whether it’s a DIY job and how much it might cost:

Essential Tools And Parts

To diagnose and repair the P1777 code, you will likely need the following tools and parts:

Step-by-Step Procedure

  1. Inspect the wiring: Check the wiring and connectors around the step motor for damage or corrosion. Address any wiring or connector issues as needed
  2. Test the step motor: Use a multimeter to test the step motor’s resistance and functionality.
  3. Test the circuit: Check the circuit for continuity and voltage using the multimeter. And then fix it if necessary
  4. Replace step motor: If the step motor is found faulty, replace it with a new or tested working one.
  5. Clear codes: After repairs, clear the codes using the OBD-II scanner and test-drive the vehicle to ensure the issue is resolved.
Watch this video to learn how to fix P1777 (and P1778) on Nissan’s vehicle by Cleber o negociante da america.


  • Tips: Consult the vehicle’s repair manual for specific testing procedures and values.
  • Caution: Ensure safety precautions when working with electrical components.

Read more: Nissan Trouble Codes: Comprehensive List For OBD1/OBD2

DIY Repair Level And Estimated Costs

The diagnosis and repair of the P1777 code involve moderate complexity and require a good understanding of automotive systems. If you possess technical skills, you can attempt this repair. However, if uncertain, it’s advisable to consult a professional mechanic.

Here’s a general cost overview for potential repair tasks that may arise during the process:

Repair TaskEstimated Cost Range
Replacement step motor (if needed)$50 – $200+
Wiring repair kit (if needed)$20 – $50
Mechanic labor (if seeking professional help)$100 – $200+

Keep in mind that these costs can vary based on factors such as location, vehicle model, and the source of parts. If unsure about the repair process or the issue at hand, it’s recommended to consult a qualified mechanic for a proper diagnosis and resolution.

P1777 Nissan Infographic

P1777 Nissan
Check this infographic for the summarized information about this P1777 code on Nissan vehicles.

Final Thoughts

It is essential to equip yourself with good knowledge before popping the hood. This article has provided you, as a professional or even DIY enthusiast, with a good insight into P1777 on Nissan vehicles. Remember to address this issue to ensure the optimal performance of your Nissan.

Share your journey, questions, and insights in the comments below. If this information proves valuable, share it with fellow enthusiasts. Keep the road ahead smooth and the repairs purposeful!

Reference Sources

  1. Nissan Altima Service Manual, P1777 Step Motor – Nissan Altima – Automatic Transmission (Section TM)
  2. JustAnswer, P1777 Step Motor PDF – JustAnswer – Questions