Error code

OBD2 P0581

OBD2P0581
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Cruise Control Multi-Function Input 'A' Circuit High.

Severity

moderateCan drive, but avoid using cruise control.

Summary

P0581 indicates a high input voltage issue with the cruise control multifunction switch 'A' circuit. This problem typically affects the clock spring mechanism or wiring between the switch and the PCM.

Symptoms

  • Stored trouble code
  • Illuminated warning light (depending on vehicle)
  • Cruise control system may not engage, deactivate, or activate properly

Common Causes

  • Damaged, burnt, shorted, or corroded wiring and connectors in the cruise control system
  • Defective clock spring mechanism
  • Short circuits caused by defective switches
  • High resistance due to bad electrical connections
  • Failed PCM (rare)

Diagnosis

  1. Record all fault codes and freeze frame data.
  2. Inspect wiring and connectors for damage or corrosion.
  3. Check clock spring mechanism if no visible issues found.
  4. Consult manual for specific troubleshooting steps.

Fixes

  • Repair damaged wiring, replace defective switches or clock spring as needed.

FAQ

Can I drive with P0581?

Yes, but avoid using the cruise control system.

What causes P0581?

Common causes include damaged wiring or connectors and a faulty clock spring mechanism.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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