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2020 LEXUS UX 200
2.0L I4•FWD•AUTOMATIC•gas
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Repairs0Labor476Torque3316Fluid7DTC1942Battery1Maintenance0Recalls0
P0593low severityPowertrain

Cruise Control Multi-Function Input A Circuit High

on 2020 Lexus UX 200 2.0L I4 · FWD

What this code means

The signal voltage from the cruise control multi-function input switch is too high. This is typically caused by an open circuit or a switch stuck in a failed state.

Symptoms

  • Cruise control inoperative
  • No response from cruise buttons
  • Cruise fault indicator lit

Common causes

  • Open circuit in switch wiring
  • Faulty cruise control switch
  • Loose or disconnected connector
  • Broken clockspring in steering wheel

Diagnostic steps

  1. Retrieve stored cruise control codes
  2. Inspect switch wiring for opens
  3. Check connector seating and pins
  4. Verify input voltage while pressing switch
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