2003 Fiat Punto Engine management light come on after head unit fitted.

[DanHowells]

Hey Guy's! "2003 Fiat Punto"

Had a customer's car come into me in work today. "I work as an audio fitter"

It had a standard fiat radio in it. Went to install a kenwood into it. Had to wire it to the fuse box so it would switch off with the Ignition. Went very well then the customer came back 10 mins later and said there was a management light on the dash. I plugged my code reader in and came up as "P0505" Cleared the code and it came back on half hour later. Just wondering what it could be.

Thanks

 

[Most Easterly Pandas]

A quick Google returns Idle control valve

 

[Thunderbug]

Would this happen on an APE if I fitted a DAB radio head-unit.