Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 2.0 ltr./85 kW Engine, Fuel Injection and Ignition System | Self diagnosis, V.A.G Inspection Service | Self-diagnosis I

Technical data of self-diagnosis

Engine identification characters	AEG	APK	AQY	AZH	AZJ
System denomination	Motronic M5.9.2	Motronic M5.9.2	Motronic M5.9.2	Motronic ME 7.5	Motronic ME 7.5
Exhaust limit values conforming to	TIER-1	EU-2	EU-4/D4 (EU-3) ¹⁾	EU-4	EU-4
Lambda control	1 Lambda probe	1 Lambda probe	2 Lambda probes	2 Lambda probes	2 Lambda probes
Knock control	2 knock sensors	2 knock sensors	2 knock sensors	2 knock sensors	2 knock sensors
Variable intake manifold length	no	no	no	no	yes
Camshaft adjustment	no	no	no	no	no
Secondary air system	no	no	yes	yes	yes

¹⁾ the standard D4 (EU-3) is only applicable to models with automatic gearbox.

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