Toyota Corolla Cross: M20a-fks Spark Plug

 Removal

REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL) Procedure Part Name Code 1 PRECAUTION - - - 2 FRONT SEAT ASSEMBLY - - - - 3 SEPARATE TYPE FRONT SEATBACK COVER 71073S - - -

 Catalyst System Efficiency Below Threshold Bank 1 (P042000)

MONITOR DESCRIPTION The ECM uses air fuel ratio sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air fuel ratio sensor (sensor 1), sends pre-catalyst information to the ECM. The second sensor, the air fuel ratio sensor