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2020 SUBARU OUTBACK
2.5L H4•AWD•CVT•gas
6 active safety recalls on this vehicle — view recalls
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Repairs0Labor547Torque3560Fluid8DTC919Battery1Maintenance0Recalls6
P1400low severityPowertrain

Fuel Tank Pressure Control Solenoid Low

on 2020 Subaru Outback 2.5L H4 · AWD

What this code means

The PCM has detected a low-signal condition in the fuel tank pressure control solenoid circuit. This solenoid is part of the EVAP system and controls fuel tank pressure during emissions testing.

Symptoms

  • Check Engine Light
  • EVAP system monitor incomplete
  • Failed emissions test
  • Possible fuel odor

Common causes

  • Faulty fuel tank pressure control solenoid
  • Wiring short to ground
  • Corroded solenoid connector
  • EVAP system blockage
  • PCM driver issue

Diagnostic steps

  1. Test solenoid resistance
  2. Check wiring for shorts to ground
  3. Inspect connector for corrosion
  4. Command solenoid with scan tool
  5. Smoke test EVAP system

Repair notes

Replace the fuel tank pressure control solenoid if it fails electrical testing.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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