Strange Noise

[Guest petruha]

Hi there to all, i just bought Citroen C4 SX 1.6 2008

great car, enjoy every second of it.

now i just noticed a strange thing.

when a turn the switch on, (the engine is off) every few minutes i hear a strange noise for a few 2-3 seconds. sound like small electric engine or some kind of pump. it comes and goes every 5 minutes approximately. maybe that is o.k and nothing wrong. i just wanted to know what is that noise??

any body knows?

[paul.h]

If the noise is from the back it could be the fuel pump. Try also posting on the C4owners.org forum, this is more active for the C4 than this forum.