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2007 LEXUS LS 460
4.6L V8•RWD•AUTOMATIC•gas
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Repairs0Labor484Torque3365Fluid7DTC1857Battery1Maintenance0Recalls0
P0590low severityPowertrain

Cruise Control Multi-Function Input B Circuit Stuck

on 2007 Lexus LS 460 4.6L V8 · RWD

What this code means

The PCM detected the cruise control multi-function input B signal stuck in one state. A jammed switch or shorted circuit is likely the cause.

Symptoms

  • Cruise control won't respond
  • Stuck cruise functions
  • Warning light on

Common causes

  • Stuck cruise control switch
  • Shorted switch circuit
  • Damaged wiring or connector
  • Failed control module

Diagnostic steps

  1. Read codes and freeze-frame data
  2. Monitor cruise switch input signal
  3. Inspect switch and wiring for shorts
  4. Replace stuck switch or repair circuit
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