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2020 SUBARU LEGACY
2.5L H4•AWD•CVT•gas
6 active safety recalls on this vehicle — view recalls
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Repairs0Labor488Torque4342Fluid9DTC1881Battery1Maintenance0Recalls6
C1102moderate severityChassis

Power Supply Voltage High

on 2020 Subaru Legacy 2.5L H4 · AWD

What this code means

The ABS module sees system voltage above the acceptable range. Often linked to charging system overvoltage.

Symptoms

  • ABS warning light on
  • Intermittent ABS operation
  • Charging light may be on

Common causes

  • Faulty voltage regulator/alternator
  • Bad battery connection
  • Wiring fault to module
  • Failed ABS module

Diagnostic steps

  1. Measure battery/charging voltage
  2. Check alternator output
  3. Inspect ABS power supply wiring
  4. Repair charging system or wiring
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