Code Definition

P0589 — Cruise control multifunction switch signal error - Circuit B

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

About P0589

P0589 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 P0589 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 P0589 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

This fault code indicates that the engine control module (ECM) or the body control module (BCM) has detected a signal error from Circuit B of the cruise control multifunction switch. The multifunction switch is an integral part of the cruise control system, enabling the driver to set, adjust, and deactivate cruise control speeds. A signal error in Circuit B suggests an issue with the electrical functioning of this part of the switch, which may lead to irregular or non-functional cruise control operations.

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