Fuel injection amount learning process (diesel-powered vehicles)
To keep exhaust emissions and engine noise low, the engine very occasionally performs a learning process for the fuel injection amount.
The engine sounds slightly different from usual while the learning process is taking place. The change in the engine sound does not indicate a fault.
See also:
Warning display list (when the ignition switch is “ON”)
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Interrupt display screen (when the ignition switch is “ON”)
Warning display
When there is information to be announced, such as a system fault, a sound is
emitted and the information screen switches to the warning display screen.
Refer to the warning list a ...