Conditions

O2S Circuit. Slow Response. Sensor 1.





Fault symptoms
- Market US/CA: CHECK ENGINE

On-Board Diagnostics

Type of diagnosis:
- Test 1: Continuous. But interrupted when fault criteria fulfilled and does not restart until next driving cycle.
- Test 2: Once per driving cycle. Interrupted when fault criteria fulfilled or OK reported. Restarts next driving cycle.

Enable criteria:
- General conditions for this trouble code: Atmospheric pressure must exceed 72 kPa and the engine coolant and intake air temperature must exceed -7 °C.
- Test 1: Engine running. Closed loop blocked in rich or lean position for a number of combustions to hold current from oxygen sensor 2 at 0.6 V. The required number of combustions is adapted.
- Test 2: 3 minutes since start of engine. The vehicle is driven with an engine speed of 1300 - 2200 rpm with a load corresponding to 250 - 500 mg/c (air quantity/combustion). Closed loop is active and stable. Air mass/combustion stable. Purging is active. Coolant temperature above 60 °C. No change in brake light status. When all conditions are fulfilled wait 3 sensor transitions. Then count the number of combustions during 8 sensor transitions.

Fault criteria:
- Test 1: The adapted number of combustions during which closed loop is blocked in rich or lean position exceeds 50.
- Test 2: Number of combustions exceeding 580.

Dependents:
- P0116,P0117,P0118,P0131,P0132 and P0134.

System reaction to a fault:
- None.

OK report:
- Test 1: Number of adapted combustions has dropped at some time during the driving cycle. Test 2 performed once and fault criteria not fulfilled.

Fault handling: Fault Handling III, Other Emission-Related Comp. & Function
- Type III.

Diagnostic help
Fault diagnosis concerns an internal fault in the sensor.

Diagnostic tool functions related to this fault are:
- Diagnostic status for the diagnosis.
- Heated oxygen sensor reading, in V.

See also the description of test values under "Fault diagnosis, general" for more information.
Tech 2 Menu Structure, DTC Menu, Read Value, Activate, Sys Info

NOTE: 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.

Proceed to Diagnostic Procedures Changing Components