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Home >> Subaru >> 2019 >> Outback 2.5i >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (2.5L) (Diagnostics) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0172: System Too Rich Bank 1 >> Diagnostic Method

Diagnostic Method

Compare the diagnostic value with the threshold value, and if a condition meeting the malfunction criteria listed below continues for 10sx3time(s) or more, judge that there is a fault in the fuel system.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Offset amount of main feedback compensation < Value from Map
WARM-UP INCREASE COMPENSATION COEFFICIENT - MAP

Warm-up increase compensation coefficient 0.000 0.102 0.199 0.301
Threshold Value 0.67-0.000 0.67-0.102 0.67-0.175 0.67-0.237
Warm-up increase compensation coefficient 0.398 0.465
Threshold Value 0.67-0.289 0.67-0.319

time needed for diagnosis:10sx3time(s) 

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

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