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2011 SUBARU IMPREZA

2.5L H4•AWD•CVT•gas
14 active safety recalls on this vehicle — view recalls
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Repairs0Labor563Torque3693Fluid9DTC889Battery0Maintenance0Recalls14
P1088low severityPowertrain

Tumble Generator Valve 1 RH Position Sensor Low

on 2011 Subaru Impreza 2.5L H4 · AWD

What this code means

The PCM has detected a low-voltage condition on the Tumble Generator Valve 1 right-hand position sensor circuit. This is the right bank counterpart to P1086.

Symptoms

  • Check Engine Light
  • Minor fuel economy reduction
  • Slightly increased emissions

Common causes

  • Faulty TGV 1 RH position sensor
  • Wiring short to ground
  • Corroded connector
  • Sensor damage from heat

Diagnostic steps

  1. Check TGV 1 RH position sensor voltage on scan tool
  2. Inspect sensor connector
  3. Test wiring for shorts to ground
  4. Verify reference voltage
  5. Compare left and right bank TGV readings

Repair notes

Replace the TGV position sensor if faulty; repair wiring if shorted.

Other Powertrain codes on this vehicle

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