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1998 SUBARU OUTBACK
2.2L H4•AWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor496Torque2292Fluid9DTC1605Battery1Maintenance0Recalls2
P0175high severityPowertrain

System Too Rich Bank 2

on 1998 Subaru Outback 2.2L H4 · AWD

What this code means

The long-term fuel trim for Bank 2 has exceeded the negative limit, indicating rich running on Bank 2.

Symptoms

  • Check Engine Light
  • Black smoke
  • Poor fuel economy
  • Rich exhaust smell

Common causes

  • Leaking injector Bank 2
  • High fuel pressure
  • Faulty O2 sensor Bank 2
  • EVAP issue

Diagnostic steps

  1. Check fuel trim Bank 2
  2. Test injectors Bank 2
  3. Test fuel pressure
  4. Check O2 sensor Bank 2

Repair notes

Same diagnostic approach as P0172 but focused on Bank 2.

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