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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Steering >> Manual Steering >> Power Steering System - Diagnostic Codes & Circuit Tests >> Power Steering System >> DTC C123A-17: Supply Voltage Circuit Voltage Above Threshold [11/2023 - ] >> Description

DTC C123A-17: Supply Voltage Circuit Voltage Above Threshold [11/2023 - ]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
C123A-17 Supply Voltage Circuit Voltage Above Threshold IG voltage is higher than the standard value
  • Harness or connector
  • Rack and pinion power steering gear assembly
  • Backup Boost Converter Circuit (w/ Stop and Start System)
 EPS warning light: Comes on -
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