Engine-Codes - Generic - P1777

P1777 Code - Step Motor Circuit

- Code Popularity: 53,282 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
ChatAC AutoCodes.com AI Chat

What are the Possible Causes of the DTC P1777?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Step Motor
  • Step Motor harness is open or shorted
  • Step Motor poor electrical connection

Code Tech Notes









User Submitted Video

⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC P1777?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Search for P1777 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1777 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P1777 Code Mean?

The Step Motor changes the step by turning 4 coils ON/OFF according to the signal from Transmission Control Module (TCM). As a result, the flow of line pressure to the primary pulley is changed and the pulley ratio is controlled. The Diagnostic Trouble Code (DTC) will set when the Step Motor does not respond to the TCM command.

P1777 Code - Step Motor Circuit

Need more Information on the Code?

Need more information on how to fix the P1777 code? Get Access to Factory Service Manuals

Code P1777 Information for Specific Makes

Need Help with the Code?

Get the P1777 code diagnosed by a professional: Find a repair shop in your area