Code Definition

P0580 — Cruise Control Multi-Function Input A Circuit Low

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

About P0580

P0580 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 P0580 is stored, the module has detected a signal or supply voltage lower 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 P0580 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 cruise control multi function input A circuit carries several switch functions on a single wire using a resistive ladder, where each button places its own distinct resistance into the circuit so the Engine Control Module can identify the request from one signal voltage. At rest the circuit is held high by a pull up resistor inside the module, and each valid button press pulls it down to a specific step, with the lowest legitimate step still sitting comfortably above ground. DTC P0580 sets when the ECM measures a voltage on input A below that lowest valid step, typically under about 0.2V, f...

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