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Home >> Subaru >> 2018 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (1 Of 4) (Except For STI) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P014C: A/F/O2 Sensor Slow Response - Rich To Lean Bank 1 Sensor 1 >> Notes

DTC P014C: A/F/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) (EXCEPT FOR STI)>Clear Memory Mode>OPERATION , and inspection mode Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>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) (EXCEPT FOR STI)>Front Oxygen (A/F) Sensor .