P0131
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Misfiring can occur before trouble code is generated.
O2S Circuit. Low Voltage. Sensor 1.
Fault symptoms
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Misfiring can occur before trouble code is generated.
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On-Board Diagnostics
Type of diagnosis:
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Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.
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Enable criteria
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General condition for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature must exceed -7°C.
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Engine running. Main relay voltage exceeding 10V. Oxygen sensor 2 voltage exceeding 0.700 V.
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Fault criteria
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Voltage below 0.025 V for more than 15 s.
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Dependents
System reaction to a fault
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Closed loop is blocked.
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OK report
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P0134 Test 1 and Test 2 performed once and fault criteria not fulfilled. 60 s has expired and closed loop still active. Fault criteria for P0131 or P0132 not fulfilled.
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Fault handling:
(For more information, see
.)
Diagnostic help
Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.
Functions in the diagnostic tool related to the fault:
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Diagnostic status for the diagnosis.
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Oxygen Sensor Value, unit V.
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For more information, see
.
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Note
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The oxygen sensor receives reference oxygen from the surrounding air via the connecting cables. For this reason, electrical contact spray or grease must
not
be used on the oxygen sensor connector.
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Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.
