Hi Guys
The engine management light has started coming on in my car it is an sti type uk 04 plate
It was on then went off for a while then came back on flashed for a while then stayed on again and is now doing this constantly flashing for short period then staying on
Anyone got any idea's what can be causing this to happen
Thanks in advance

 

Have a look on www.scoobypedia.co.uk on how to check for error codes

 

Can't check error codes without OBD-II cable and software on a newage, no plugs under dash to connect like in classic.

If it flashes under boost it can mean the ecu has detected knock, but it doesnt usually stay on in that case. A sensor is sending a value it doesnt like, A likely candidate is O2 sensor, but there are so many error codes you need to plug it in and read the fault.

See if there's a normal garage locally that can read error codes, most can now as its a standard connection. Otherwise ask on a local subaru club if anyone has cable and software, otherwise a phone call to a dealer (some charge up to 50quid ! - some will do it free) or subaru specialist to read the stored error codes.

 

Mine came on when fitting a decat exhaust.