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P1131

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE.

P1131


O2S. Switch point - lean. Sensor 1


Fault symptoms


• CHECK ENGINE.


On-Board Diagnostics

Type of diagnosis:


- Continuous. Terminated when fault criteria fulfilled. 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 be above -70°C.

- Engine running. Closed loop blocked in rich or lean mode for a number of combustions in order to maintain a voltage of 0.6V from oxygen sensor 2. The number of combustions that is required is adapted.


Fault criteria:


- Closed loop blocked in rich mode for more than 35 combustions.


Dependents:


- P0115, P0116, P0117, P0118, P0119, P0131, P0132 and P0134.


System reaction to a fault:


- None.


OK report:


- Number of adapted combustions has dropped at some time during the driving cycle.


Fault handling: (See section Fault handling III, other emission-related components and functions for more information.)


- Type III.


Diagnostic help

Fault diagnosis concerns an internal fault in the sensor.

Functions in the diagnostic tool related to the fault:


• Diagnostic status for the diagnosis.


See also description of Menu "Read Values" for more information.

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.