T8 / P1131 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)

P1131 00

Fault symptom

Fault indicator lamp (for further information see WIS Fault diagnosis, general)

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Engine speed between 1500 and 2800 rpm.

Engine load between 200 - 400 mg/c.

No changes in load.

Closed loop is blocked (rich or lean) for a number of combustions in order to maintain 0.7V from oxygen sensor 2. The prescribed number of combustions is adapted.

Fault criteria:

Closed loop blocked in rich mode for more than 40 combustions.

Dependent:

None

System reaction to a fault:

None

OK report:

Diagnosis completed without fault report.

Fault handling:

Type III

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

Diagnostic help

Diagnosis regards:

Defective oxygen sensor.

Functions in the diagnostic tool related to the fault:

Test value:

•

O2S 1

•	Closed Loop

(See also description of readings/activations in diagnostic tool)