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Home >> Subaru >> 2016 >> Forester 2.5i, Eng CD FB25BA, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Diagnostics) (H4DO) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P014C O2 Sensor Slow Response - Rich To Lean (Bank 1 Sensor 1) >> Notes

DTC P014C O2 Sensor Slow Response - Rich To Lean (Bank 1 Sensor 1): Notes

DTC DETECTING CONDITION: 

Detected when two consecutive driving cycles with fault occur.

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode Ref. to ENGINE (DIAGNOSTICS) (H4DO) > Clear Memory Mode >  OPERATION   , and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DO) > Inspection Mode >  PROCEDURE   .
  1. CHECK EXHAUST SYSTEM  .
    NOTE: Check the following items.
    • Loose installation of front portion of exhaust pipe onto cylinder heads
    • Loose connection between front exhaust pipe and front catalytic converter
    • Damage of exhaust pipe resulting in a hole

    Is there any fault in exhaust system?

    Yes: Repair the exhaust system.

    No: Replace the front oxygen (A/F) sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO) >  FRONT OXYGEN (A/F) SENSOR  .