Reset Krups EA815070/70

Hello,
I've tried this procedure but there's no "P2" message, see mid-procedure
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Unplug the coffee maker from the mains.
- Remove the water tank, the grounds container and the tray above the grounds container.
- Press the arrow button while plugging the coffee maker back into the mains.
- Press the START button once and brackets [ ] will appear on the right-hand side. Press the START button once and hooks [ ] will appear on the right-hand side.
- Press the START button once and 3 zeros will appear inside the hooks [000] on the left-hand side.
- Place the water tank and tray on top of the grounds container and the grounds container.
- Now press the START button.

P2 appears.

- Press the steam button once to start diagnostics.
- Water starts flowing out of the steam nozzle.
- Press the steam button once.
- The piston descends, but not completely. The piston descends, but not completely (twice).
- The piston descends completely, water flows through the piston and the disc is ejected.

P4 appears.

Disconnect the coffeemaker from the mains.
Reconnect it to the mains, switch on the coffeemaker and it will have been calibrated.
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Unable to complete this procedure
If anyone has any ideas please let us know.
T.

Hi! Don't press the arrow when starting, press the gear.

Indeed, switch on with the config button, instead of the arrow button, and finally P3 will be displayed instead of P4, and the sensor in the coffee grounds tray will be eliminated.

Is that a reset or calibration procedure?