Subaru LEGACY 2006 Manual page 646

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Diagnostic Trouble Code (DTC) Detecting Criteria
DK:DTC P2096 POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of fuel system from the amount of sub feedback control.
Sub feedback learning control is being performed and when the learning value goes to the lean side, judge
as NG.
2. COMPONENT DESCRIPTION
(3)
V
(2)
(1) Atmosphere
(2) Exhaust gas
(3) Electromotive force
3. ENABLE CONDITION
Secondary Parameters
Continuous time when the following con-
ditions are established
Sub feedback learning execution condi-
tions
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously at a constant speed of 50 — 100 km/h (31 — 62 MPH).
(1)
(2)
(A) Electromotive force
(B) Air fuel ratio
(C) Rich
Enable Conditions
1 second or more
Completed
GD(H4SO)-209
GENERAL DESCRIPTION
(E)
(A)
(C) (B)
(D) Lean
(E) Theoretical air fuel ratio
(F) Comparative voltage
(F)
(D)
EN-01696