removed the dump valve

[golf1.8t]

ive removed my dump valve but the engine managment light still comes on

[topher]

you need to get the fault code cleared with vag diagnostic software, or just disconnect your battery for 10 minutes (remember you'll need the security code for your stereo)

[dubvrs]

Disconnect your battery for a couple of minutes and that clears the fault codes.

Had the same on mine when a boost pipe sheared off. Replaced pipe but still no boost. Disconnected battery and all ok.

[golf1.8t]

ive had the light turned off and code cleared but its come on agian  its  says  bank1 systems too rich   

[topher]

did you refit your old diverter valve properly ? check all the hoses to it are tight, especially the little vacuum hose, follow that one along its entire length and check for splits.