T8 / P0134 00

Read the instructions below then start the fault diagnostic procedure.

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

P0134 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.

•	Engine running.

•	Lambda status 0.15 or 16.

•	Secondary air injection pump inactive (SAI).

•	EVAP, leakage diagnostics inactive.

•	Preheating active for more than:

(depending on start temperature, the lowest of coolant and intake air temperature is selected)

-9°C 570s.

-8°C 270s.

+8°C 270s.

+9°C 80s.

•	NONE of the following DTCs must be detected:

P0112, P0113

Fault criteria:

When voltage across the sensor has not been outside of the range 0.30-0.60 V for 10 s.

Dependent:

None

System reaction to a fault:

Closed loop is blocked.

Preheating of oxygen sensors 1 and 2 is stopped.

Fuel adaptation is reset and switched off.

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.)

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 1

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