P0133
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
O2S Circuit. Slow Response. Sensor 1.
Fault symptoms
On-Board Diagnostics
Type of diagnosis:
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Test 1: Continuous. However, it is interrupted once the fault criteria have been fulfilled and does not restart until the next driving cycle.
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Test 2: Once per driving cycle. It is interrupted once fault criteria have been fulfilled or OK has been reported. Restarts next driving cycle.
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Enable criteria:
(Conditions that must be fulfilled for diagnostics to be performed.)
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Global conditions for this diagnostic trouble code: When starting the engine, the atmospheric pressure must exceed 78 kPa and the temperature of the coolant and the intake air must exceed -7°C.
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Test 1: Engine running. Closed loop is blocked at rich or lean during a number of combustions to retain a voltage from oxygen sensor 2 of 0.6V. The number of combustions necessary is adapted.
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Test 2: 3 min. since engine started. Car stationary. Idle speed control active. Closed loop active and stable. Air mass/combustion stable. Purge active. Coolant temperature above 60°C. No change in brake light status.
Wait for 3 sensor transitions once all the criteria have been fulfilled. Then, count the number of combustions that occur during 15 sensor transitions.
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Fault criteria:
(When enable criteria have been fulfilled, diagnostics will check if the fault criteria have been fulfilled.)
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Test 1: The adapted number of combustions during which the closed loop control is blocked at rich or lean exceeds 50.
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Test 2: The number of combustions exceeds 460.
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Dependents:
(Once fault criteria have been fulfilled, a number of other diagnostics must report OK before the diagnostic trouble code can finally be generated.)
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P0116, P0117, P0118, P0131, P0132 and P0134.
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System reaction to a fault:
(Once the fault criteria have been fulfilled, certain measures will sometimes be taken.)
OK report:
(This diagnosis may be included as a dependent to another diagnosis and must therefore report OK even if it is continuous. The OK report is also used in fault handling to count down the fault counter.)
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Test 1: The number of adapted combustions has dropped at some time during the driving cycle. Test 2 performed once and fault criteria not fulfilled.
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Fault handling:
(Refer to section “Fault diagnosis, general” for more information.)
Diagnostic help
Fault diagnosis concerns an internal fault in the sensor.
Diagnostic tool functions related to this fault:
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Diagnostic status for the diagnosis.
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Oxygen sensor reading, unit V.
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Refer also to the description of readings under ”Fault diagnosis, general” for more information
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Note
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The oxygen sensor receives reference oxygen from the surroundings via the connecting cables. For this reason, contact spray or grease must
not
be used on the oxygen sensor connector.
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Check the wiring
Jiggle the wiring harness at several points and in different directions to check if there are intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic instrument during the test.
