Audi A3 2004 Workshop Manual Direct petrol injection and ignition system
Servicing injection system
The engine control unit has a self-diagnosis capability. Before carrying out repairs and fault finding the fault memory must be interrogated. The vacuum hoses and connections must also be checked (unmetered air).
♦ Fuel hoses in engine compartment must only be secured with spring-type clips. Clamping-type or screw-type clips must not be used.
♦ A voltage of at least 11.5 V is required for proper operation of the electrical components.
♦ Do not use sealants containing silicone. Particles of silicone drawn into the engine will not be burnt in the engine and will damage the Lambda probe.
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