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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Control System (Diagnostics) (P2101 To U171F) (H4DO)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P219C Cylinder 1 Air-Fuel Ratio Imbalance >> Diagnostic Method

Diagnostic Method

WARNING: This page is about a different variant/trim than selected.

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Imbalance value n of imbalance cylinder > 0.2
or
< -0.5
Imbalance value n = i correction value n - average value (i correction value n of other three cylinders) i correction value n = correction value of each cylinder
Imbalance cylinder: Maximum value of cylinder (absolute value (imbalance value n)) (n: Any of cylinder numbers (#1, #2, #3, #4)
 

Time needed for diagnosis:  300time(s) (9.6 sec)

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.