Code Definition

P0577 — Cruise Control Input Circuit High

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0577

P0577 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0577 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0577 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0577 fault code is set when the Engine Control Module (ECM) detects that the input signal from the cruise control system is higher than expected. This condition indicates an issue in the electrical circuit associated with the cruise control input. The cruise control system relies on input signals from various sources like cruise control buttons or switches to function correctly. A high input signal can suggest an electrical issue such as a short to power, a malfunctioning switch, or problems with the wiring or connectors. This condition can lead to malfunctions in the cruise control syste...

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