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Citroen xsara Picasso dashboard light bulb is the bulb that's for the dashboard light climate control. The you tube web site gives you information as how to change the bulb.
T5 0.6w although 1.2w give a brighter light
the light tells you that you have passed its service interval
NO
It's under the n/s front light.
Take the gearbox out and flip it round twice
The alternator needs attention or replace
ABS Brakes need servicing.
Engine
use ignition key in passanger sideof the dash with door open to turn airbag on the light goes out
To reset the engine management light on a Citroen Picasso, press and hold the trip reset button. Turn ignition key to position 2. By keeping the button pressed in, the trip meter will count down. When zero is reached, release the trip button and the start car service light will be extinguished.
its the tyre pressure sensor