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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> Suspension >> Wheels & Tire System >> Tire Pressure Monitoring System (TPMS) (Diagnostics) >> General Diagnostic Table >> Inspection

General Diagnostic Table: Inspection

Symptoms Faulty parts
Tire pressure warning light illuminates. Tire pressure is reduced.
  • Improper tire pressure adjustment.
  • Punctured tire
Tire pressure warning light blinks 25 times and then illuminates. Tire pressure monitoring system has malfunction.
  • Air pressure sensor malfunction
  • Air pressure sensor is out of battery.
  • Defective TPMS & keyless entry CM or TPMS CM
  • Defective vehicle harness
  • Defective combination meter
Tire pressure is dropping but the warning light does not illuminate. Tire pressure warning light does not illuminate.
  • Air pressure sensor is faulty.
  • Defective TPMS & keyless entry CM or TPMS CM
  • Defective combination meter