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 V | Display groups 001 up to 028 | Analysis: Display group 001, display field 3 - lambda control before the catalytic converter

Analysis: Display group 001, display field 3 - lambda control before the catalytic converter

Display -V.A.G 1552 -

Possible cause of fault

Rectifying fault

not within tolerance

Minimum range: Mixture too rich, the lambda control leans the mixture
Plus range: Mixture too lean, lambda control enriches

–	wait 30 seconds until the display has stabilised

Unmetered air

–	Testing intake system for tightness → Chap. 24-2.

Injection valve defective

–	Check the resistance values of the injectors (12...17 Ω at approx. 20 °C).

–	Test wiring and plug connections according to current flow diagram.

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