P0577 Cruise Control Input Circuit High

OBD2 Code Definition: P0577 is a diagnostic trouble code (DTC) for “Cruise Control Input Circuit High.” This code indicates that the cruise control system has detected an issue with the input circuit, specifically that the voltage level is higher than expected.

p0577 – Cruise Control Input Circuit High

Typical Severity: Moderate

Common Causes

P0577 – Cruise Control Input Circuit High

Common causes:

• Faulty cruise control switch
• Short circuit in the cruise control input wiring
• Faulty cruise control module
• Corrosion or poor connection at the cruise control switch or module

 

Common Misdiagnosis

OBD2 Code: P0577

Description: Cruise Control Input Circuit High

Common Misdiagnosis: Replacing the cruise control switch or buttons without checking for wiring issues or a faulty brake light switch.

 

Common Diagnostic Steps

OBD2 Code: P0577

Description: Cruise Control Input Circuit High

Common Diagnostic Steps:

• Check the cruise control switch for proper operation and resistance.
• Inspect the wiring and connectors related to the cruise control system for damage or corrosion.
• Test the voltage at the cruise control switch connector to ensure it is within specifications.
• Examine the brake pedal position sensor as it can affect cruise control functionality.
• Use a scan tool to monitor live data from the cruise control system for any irregularities.
• If equipped, check for any related trouble codes in other modules that might affect cruise control operation.
• Consult vehicle-specific repair manuals or technical service bulletins (TSBs) for known issues with this code on your vehicle model.