Skip to main content
Diagnose/P2097
P2097Medium SeverityEmissions

Post Catalyst Fuel Trim System Too Rich (Bank 1)

What This Means

The fuel system downstream of the catalytic converter on bank 1 is reading too rich. This means too much fuel or insufficient air is present after the catalytic converter.

Common Symptoms

  • Check engine light on
  • Sulfur smell from exhaust
  • Reduced performance
  • Failed emissions test

Common Causes

  • Catalytic converter degradation
  • Faulty downstream O2 sensor
  • Engine running rich upstream
  • Oil or coolant entering exhaust
  • Leaking fuel injector

Estimated Repair Cost

$150 – $800
Parts and labor (varies by vehicle and location)
Difficulty:Moderate

Need This Fixed?

Find certified mechanics near you who can diagnose and repair P2097.

Find a Shop Near You
Search Another Code

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.