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P0989moderate severityPowertrain

Transmission Fluid Pressure Sensor/Switch E Circuit High

on 1993-2001 Subaru Impreza 2.2L H4 · AWD

What this code means

The PCM detected a high voltage signal from the transmission fluid pressure sensor/switch E. This can cause incorrect pressure control and shifting problems.

Symptoms

  • Harsh shifts
  • Erratic shift behavior
  • Check engine light on

Common causes

  • Faulty fluid pressure sensor E
  • Open circuit in wiring
  • Poor connector contact
  • Faulty PCM/TCM

Diagnostic steps

  1. Retrieve stored codes
  2. Inspect sensor wiring for opens
  3. Check connector for corrosion
  4. Test sensor signal and reference voltage

Other Powertrain codes on this vehicle

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