When pressed button 2 open car the alarm came on and stayed on. The only way to stop it was to take terminal off battery,

The way to silence the alarm is to put the key in the ignition. If the fault recurs take the car to a Peugeot garage.

Hi well as usual BAZZA has an excellent answer.

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Too hot maybe?

When pressed button 2 open car the alarm came on and stayed on. The only way to stop it was to take terminal off battery,