Outline Of Diagnosis
WARNING: This page is about a different variant/trim than selected.
Detect that λ value remains rich.
Judge as NG when lambda value is determined as abnormal in accordance with driving conditions such as intake air amount, rear oxygen sensor element impedance, and main feedback control, and with front oxygen (A/F) sensor λ value.
λ value = Actual air fuel
ratio/Theoretical air fuel ratio
λ>1: Lean
λ < 1: Rich