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The memory of the diagnostic function is reset when the power to the engine is disconnected. When the power is switched on again, the diagnostic function will check if there are any malfunctions in the system. If so a new fault codes is registered.
If a malfunction has not been corrected it will be reg- istered once again and has to be acknowledged again. The Volvo Penta diagnostic tool VODIA must be used to erase a fault code.