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AutoCodes - Generic - P1777

P1777 Code - Step Motor Circuit

- Code Popularity: 53,286 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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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
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How to Fix the DTC P1777?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1777 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P1777 Description

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.

OBDII Code P1777 - Step Motor Circuit - AutoCodes.com
P1777 Code - Step Motor Circuit

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Code P1777 comments

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