Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 1.6 l/75 kW Engine, Fuel Injection and Ignition System | Self diagnosis, V.A.G Inspection Service | Self-diagnosis IV | Generating readiness code

Work step 5: Catalyst diagnosis

Readout on display:

–	Enter 046 for the “display group 046” and confirm with Q.

Initiating basic setting

Enter display group number      XXX

Readout on display:

For engines with engine code BFQ

–	Depress brake pedal and accelerator simultaneously.

–	Engine speed is increased and the readout in display field 4 switches from “Test OFF” to “Test ON”.

For engines with engine code AVU

–	Set speed to 2500...4500 rpm. The readout in display field 4 changes from “Test OFF” to “Test ON”.

Continued for all engines

–	Catalytic converter temperature in display field 2 must be at least 400 °C.

Note

This may take a few minutes.

–	Maintain the speed until the readout in display field 4 shows the specified value “CatB1 O.K.”.

If the display does not occur as described:

–	Interrogate fault memory → Chapter 01-1.

No fault in the fault memory:

–	Conduct a test drive at a constant speed.

–	Pay attention to safety precautions for test drives → Chapter 24-1.

–	Once again perform (test of conversion) diagnosis of catalytic converter.

In case of equal result:

–	Replace catalytic converter → 1.6 l/75 kW Engine, Mechanical Components; Rep. Gr.26.

If the display occurs as described:

–

Press C.

System in basic setting   46       ->

700 rpm    250.0 °C    0.96    Test OFF

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