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Diagnose/P0587
P0587Low SeverityEngine

Cruise Control Multi-Function Input B Circuit Low Input

What This Means

The cruise control multi-function input B voltage is below minimum threshold. This input signal is part of the cruise control system communication with the PCM.

Common Symptoms

  • Cruise control issues
  • Speed setting problems
  • Check engine light on
  • Cruise light off

Common Causes

  • Faulty cruise switch
  • Clock spring failure
  • Wiring damage
  • Connector issue
  • PCM circuit

Estimated Repair Cost

$75 – $400
Parts and labor (varies by vehicle and location)
Difficulty:Moderate

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.