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C1604Power steering unit over/discharge fault

  • Hyundai/Kia code · Power steering
  • Lights a warning lamp
How the car detects it
The power steering control unit reports an internal power-stage fault. When the power steering limits or stops its assistance, the steering becomes heavy but still works mechanically.
What you may notice
  • Power steering warning light
Likely causes
  • PossibleUnit wiring or connector
  • PossiblePower steering control unit
Sources

Backed by an official manufacturer document.

From Obdaryn's Hyundai/Kia pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.