Code Definition

P0566 — Cruise Control Off Signal Malfunction

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

About P0566

P0566 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 P0566 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 P0566 fault code is set when the Engine Control Module (ECM) detects a malfunction in the cruise control 'OFF' signal. This signal is an integral part of the cruise control system, and it is typically generated when the driver deactivates the cruise control function. The ECM uses this signal to disengage the cruise control system and return control of the vehicle's speed to the driver. A malfunction in the 'OFF' signal circuit can lead to issues with properly disengaging the cruise control, which could pose safety risks. Causes for this malfunction can include problems with the cruise cont...

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