PEUGEOT 308 Handbook page 274

Checks
Range indicators
When switching on the ignition, an indicator
gives an estimate of the distance that can
be travelled with your vehicle before engine
starting is automatically prevented, once the
vehicle starts using the reserve of AdBlue
after a fault is detected with the SCR system.
In the event of simultaneous system fault and
low AdBlue level, the shortest range is the one level, the shortest range is the one
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displayed.
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In the event of the risk of non-starting related to a lack of AdBlue In the event of the risk of non-starting related to a lack of AdBlue In the event of the risk of non-starting related to a lack of AdBlue
The engine start prevention system
required by regulations is activated
or or
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automatically once the AdBlue
empty.
Remaining range greater than 1 500 miles (2 400 km )
When switching on the ignition, there is no
automatic display of range in the instrument
tank is tank is
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panel.
Pressing this button will display the remaining
range.
You can access this information in the touch
screen, if your vehicle has one.
 Select the "Driving assistance"
menu.
 Then select "Diagnostic".
The range at that moment is then displayed.
Above 3 000 miles (5 000 km), the value is not
specified.
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miles (2 400 km miles (2 400 km )