LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2021 >> Forester Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0172: System Too Rich Bank 1 >> General Description >> Diagnostic Method

Diagnostic Method

Compare the diagnostic value with the threshold value, and if a condition meeting the criteria continues for 10s x 3time(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 Less than value of Map
MAP SPECIFICATION

Warm-up increase compensation coefficient 0.000 0.100 0.200 0.300 0.400 0.416
Threshold Value 0.65 0.56 0.48 0.42 0.36 0.35

Time needed for diagnosis  : 10s x 3time(s)

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

NOTE: When a short period (distance) driving from the engine start to stop is repeated, engine warm-up followed may cause detection of P0172 due to gasoline evaporation within the engine oil and blow-by gas increase.
scientia non olet · About LEMON Manuals