Code Definition

P0565 — Cruise Control On Signal Malfunction

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

About P0565

P0565 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.

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 P0565 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 P0565 fault code is set when the Engine Control Module (ECM) detects a malfunction in the cruise control 'ON' signal. This signal is part of the cruise control system and is typically generated when the driver activates the cruise control function. The ECM uses this signal to engage and maintain vehicle speed as set by the driver. A malfunction in the 'ON' signal circuit can lead to issues with activating or maintaining the cruise control function. This could be due to problems in the cruise control switch, wiring issues, or faults within the ECM or the cruise control module.

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