AutoCodes – Generic – P0577

P0577 Code - Cruise Control Input Circuit High

Quick Answer

The Engine Control Module (ECM) monitors the Cruise Control System. Common causes include Faulty Cruise Control Function Switch, Cruise Control Function Switch harness is open or shorted, Cruise Control Function Switch circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0577 indicates Cruise Control Input Circuit High.
Common causes: Common causes include Faulty Cruise Control Function Switch, Cruise Control Function Switch harness is open or shorted, Cruise Control Function Switch circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 18,276

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0577 Description

The Engine Control Module (ECM) monitors the Cruise Control System. The ECM sets the OBDII code when the Cruise Control System is not to factory specifications.

OBDII Code P0577 - Cruise Control Input Circuit High - AutoCodes.com — P0577 Code - Cruise Control Input Circuit High

What does this mean?

What are the Possible Causes of the DTC P0577?

Faulty Cruise Control Function Switch
Cruise Control Function Switch harness is open or shorted
Cruise Control Function Switch circuit poor electrical connection

How to Fix the DTC P0577?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0577 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0577 code?

Need more information on how to fix the P0577 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0577 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0577 Mazda — Cruise Control Input Circuit Above Minimum Parameters
P0577 Mercedes-Benz — Cruise Control Input Circuit High

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.