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2010 SUBARU OUTBACK
3.6L H6•AWD•CVT•gas
18 active safety recalls on this vehicle — view recalls
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Repairs0Labor536Torque4513Fluid8DTC889Battery1Maintenance0Recalls18
P1092moderate severityPowertrain

Tumble Generator Valve 2 LH Stuck Open

on 2010 Subaru Outback 3.6L H6 · AWD

What this code means

The PCM has detected that the Tumble Generator Valve 2 on the left-hand cylinder bank is stuck in the open position. This is the left bank counterpart of P1090.

Symptoms

  • Check Engine Light
  • Reduced low-load efficiency
  • Slightly rough idle
  • Higher emissions at idle

Common causes

  • Carbon buildup on LH TGV
  • Failed LH TGV actuator
  • Broken linkage on LH side
  • LH TGV shaft binding
  • LH actuator wiring fault

Diagnostic steps

  1. Command TGV 2 closed and monitor position
  2. Inspect LH TGV valve for carbon
  3. Test LH TGV actuator motor
  4. Check LH linkage condition
  5. Test actuator circuit

Repair notes

Clean carbon from the LH TGV; replace the actuator if the motor has failed.

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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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