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Diagnose/P0175
P0175Medium SeverityFuel System

System Too Rich (Bank 2)

What This Means

Bank 2 of the engine is running rich with excessive fuel. The engine computer cannot reduce fuel delivery enough to achieve the proper air-fuel ratio on this bank.

Common Symptoms

  • Fuel smell
  • Black exhaust smoke
  • Spark plug fouling
  • Poor fuel economy

Common Causes

  • Leaking fuel injector on bank 2
  • Faulty MAF sensor
  • Stuck fuel pressure regulator
  • Faulty O2 sensor on bank 2
  • EVAP purge valve stuck open

Estimated Repair Cost

$100 – $600
Parts and labor (varies by vehicle and location)
Difficulty:Moderate

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.