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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostics) (P2101 To U171F) (H4DOTC) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P219A Bank 1 Air-Fuel Ratio Imbalance >> Diagnostic Method >> Monitor B1

Monitor B1

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Diagnostic Value2 (DV2) > 17 count

Time needed for diagnosis:  1000 engine revs.

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.