DTC P0134 O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR 1)
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DTC P0134 O
2
SENSOR CIRCUIT NO
ACTIVITY DETECTED (BANK 1 SENSOR 1)
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Detect the open circuit of sensor.
Judge NG when the element impedance is large.
(1)
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Atmosphere
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(A)
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Electromotive
force
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(2)
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Exhaust
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(B)
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Air fuel
ratio
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(3)
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ZrO
2
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(C)
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Lean
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(4)
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Ceramic
heater
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(D)
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Rich
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Secondary
Parameters
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Enable
Conditions
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None
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Always perform the diagnosis continuously.
Judge NG when the continuous time of completing
the malfunction criteria below becomes more than 5 seconds.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Battery voltage
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≥ 10.9
V
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Time of heater duty ≥ 70%
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≥ 30
seconds
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(Front
O
2
(A/F) sensor control duty every 128 milliseconds ≥ 70%
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≥ 30
seconds)
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Front lambda
sensor impedance
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≥ 500 Ω
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Time Needed for Diagnosis:
5
seconds
Malfunction Indicator
Light Illumination:
Illuminates as soon as the malfunction
occurs.
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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 the OK driving cycle was completed 3 times
in a row
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•
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When “Clear Memory” was
performed
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•
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Front oxygen (A/F) sensor heater control:
Not allowed to turned on the heater.
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•
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A/F main learning: Not allowed
to calculate the A/F main learning compensation factor.
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•
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A/F sub learning: Not allowed
to calculate the A/F sub learning compensation factor.
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•
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Compensation when starting the engine
at high temperature: Make the MIN value to be 0 from 0.06 normally.
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•
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Purge control: Not allowed to purge.
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ECM OPERATING
AT DTC SETTING
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Memorize the freeze frame data. (For test
mode $02)
