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Home >> Subaru >> 2020 >> Crosstrek Base, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Control System (Diagnostics) (HEV) (4 Of 4)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P219C: Cylinder 1 Air-Fuel Ratio Imbalance >> General Description >> Outline Of Diagnosis >> Estimation Model for individual cylinder λ deviation (u (k))

Estimation Model for individual cylinder λ deviation (u (k))

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Subaru developed a model for estimating individual cylinder λ deviation* by the output signal of the primary oxygen sensor (mounted on the collector section of the exhaust manifold). This estimation model makes it possible to control cylinder A/F individually. The estimation model is designed as follows.

G10263498Courtesy of SUBARU OF AMERICA, INC.