P1131

Symptom: CHECK ENGINE.

P1131

Fault symptoms

•	CHECK ENGINE.

On-Board Diagnostics

Type of diagnosis:

-	Continuous. Ceases when fault criteria fulfilled. Restarts next driving cycle.

Enable criteria:

-	General condition for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature must exceed -70°C.

-	Engine running. Closed loop blocked in rich or lean position during a number of combustions to maintain the voltage from the oxygen sensor 2 at 0.6 V. Number of required combustions is adapted.

Fault criteria:

-	Closed loop blocked in rich position 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 at some time dropped during the driving cycle.

Fault handling: (For more information, see .)

-

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.