T8 / P0139 00

Read the instructions below then start the fault diagnostic procedure.

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

P0139 00

Fault symptom

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

On-board diagnosis

Type of diagnosis:

Once per driving cycle.

Enable criteria:

Engine Run

Coolant temperature must be over 60°C.

Battery voltage must be between 11 - 16 V.

Catalytic converter diagnosis active

Diagnostics for the following components/systems must NOT have reported a fault:

•	Mass air flow sensor

•	Shut-off valve, EVAP canister.

•	EVAP Valve

•	Oxygen Sensor 1

•	Oxygen Sensor 2

•	Tank integrity system (EVAP).

Fault criteria:

Too long a time until O2S2 shows lean.

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:

The diagnosis runs at the end of the catalytic converter diagnosis (P0420).

Functions in the diagnostic tool related to the fault:

Test value:

•

O2S 2

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