Peugeot 307 HDI airbag warning goes on and blleps

Common fault defective centralita computer sorry forgotten name in english been in spain too long .When they get hot where car is left in hot sun the lights start blinking ,these cars and citreons suffer from this fault but not often,cure new centralita ,Once vehicle goes to the test and they see it then its about 2000euros to fix because it will not pass without the relevant paperwork and certificates from dealer,Best advice sell it quick before it costs a lot of money to fix