E39 / P0140 00

Read the instructions below then start the fault diagnostic procedure.

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

P0140 00

Fault symptom

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

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Battery voltage must be between 11 - 16 V.

Motor running more than 180 s.

The ethanol content is lower than 87%.

Fault criteria:

When the voltage across the sensor is more than 1050 mV.

Dependent:

None

System reaction to a fault:

Closed loop is blocked.

Fault handling:

Type III

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

Checking the wiring harness

Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Diagnosis regards:

Electrical fault in connecting leads or component.

Functions in the diagnostic tool related to the fault:

Test value:

•

O2S 2

•	Closed Loop

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