DTC P2096 POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1
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DTC P2096 POST CATALYST FUEL TRIM SYSTEM
TOO LEAN BANK 1
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Detect the malfunction of fuel system from
the amount of sub feedback control.
Judge NG when the sub feedback learning value
sticks to lean sides during sub feedback learning control.
(1)
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Atmosphere
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(A)
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Electromotive
force
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(D)
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Lean
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(2)
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Exhaust
gas
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(B)
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Air fuel
ratio
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(E)
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Theoretical
air fuel ratio
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(3)
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Electromotive
force
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(C)
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Rich
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(F)
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Comparative
voltage
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Secondary
Parameters
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Enable
Conditions
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Continuous
time of completing condition below
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1
second or more
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Sub feedback
leaning enable condition
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Complete
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Perform the diagnosis continuously at a constant
speed of 50 to 100 km/h (31 to 62 MPH).
Judge NG when the continuous time
of completing the malfunction criteria below becomes more than 5
seconds. Judge OK when it becomes less than 5 seconds.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Sub feedback
learning value
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≤ −0.02
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Time Needed for Diagnosis:
5
seconds ×1 time
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
2 continuous driving cycles.
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•
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When the OK idling cycle was completed 40 times
in a row
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•
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When “Clear Memory” was
performed
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MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
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•
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When OK with similar drive in 3 drive cycles
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•
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When “Clear Memory” was
performed
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None
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ECM OPERATION
AT DTC SETTING
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Memorize the freeze frame data. (For test
mode $02)
