The good news is you can do it yourself as i explained to the car owner.
Here is how:
With the ignition off.
Press and Hold the trip meter button,
keep held in and turn ignition to position 1 this is the first click the one before the ignition lights come on
Keep the button pressed in for about 5 seconds until you see “Oil Service” or “Inspection” with “Reset” or “Re” in the display.
(On vehicles with “High” cluster, you will also see the amount of fuel in litres remaining until next service).
Quikly release and Press the button again now hold for a further 5 seconds or until “Reset” or “Re” flashes.
While this display is flashing,quickly release and press the button again to reset the Service Interval.
After the display has shown the new service interval you should see END SIA” for about 2 secs.
Please note this procedure should only be used after you car has been serviced and i would qeustion any company who is unable to reset the
service/oil light either using diagnostic equipment or using this method after they have have serviced a vehicle.
How to Reset the Service Light Citroen Xsara Picasso
Recently I have had a few requests for Citroen Xsara Picasso Service Light Reset information from people who service their own vehicles.
Being a mobile mechanic and auto diagnostic specialist I could use the stock answer and say “I’ll have to plug it in for you”.
As you have no doubt seen through my other posts I do not believe in making things difficult for the home mechanic.
Here is the procedure:
Sit in drivers seat ignition off and handbrake applied.
Press and hold trip reset button.
Turn key to position two (ignition lights on engine not started).
Keeping the trip reset button pressed in you will notice your trip meter counting down.
When zero (0) is reached start the car and the service light (spanner symbol) should now be extinguished.
Please only use this information after your vehicle has been serviced
When “CHECK ENGINE OIL” is displayed on the Super Monitor, press the “SELECT” button below the display until “ENGINE OIL” mode is displayed (unless it already is displayed). Then press and hold the “SET” button until “OK” is displayed.
To reset the “OIL CHANGE” light, remove the cover from the switch located below the speedometer. Insert a blunt object and depress the switch.
Longlife service intervals require diagnostic tool. Fixed intervals: Press and hold button below the speedometer. Turn ignition to the “ON” position.
“SERVICE” is displayed. Release button. Turn button below the tachometer to the right until display is reset. Turn ignition off.