Tread Depth - Vauxhall Ampera 2014 User Manual

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Each tyre pressure monitoring
system sensor has a unique
identification code. The identification
code needs to be matched to a new
tyre/wheel position after rotating the
vehicle's tyres or replacing one or
more of the sensors.
After changing wheels the vehicle
must be stationary for approx.
20 minutes, before the system
recalculates. The following relearn
process takes up to 10 minutes of
driving with a minimum speed of
13 mph. In this case A can be
displayed or pressure values can
swap in the Driver Information Centre.
If problems occur during the relearn
process, a warning message will be
displayed in the DIC.
Temperature dependency
Tyre pressure depends on the
temperature of the tyre. During
driving tyre temperature and pressure
increase. The tyre pressure value
displayed in the Driver Information
Centre shows the actual tyre
pressure. Therefore it is important to
check tyre pressure with cold tyres.

Tread depth

Check tread depth at regular
intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4 mm for winter tyres).
For safety reasons it is recommended
that the tread depth of the wheels on
one axle should not vary by more than
2 mm.
Vehicle care
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
indicators (TWI). Their position is
indicated by markings on the
sidewall.
If there is more wear at the front than
the rear, swap around front wheels
and rear wheels periodically. Ensure
that the direction of rotation of the
wheels is the same as before.
Tyres age, even if they are not used.
We recommend tyre replacement
every 6 years.
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