[Engine] EML / Loss of performance

[PeteA]

Hi chaps and chapesses. My '04 Partner 2.0 HDI is playing silly buggers, EML light on, Very rough Idle when I fired it up this morning and only making half its normal boost.Sounding/performing like an old Transit van. Has it gone into safe mode? Its a seimens ECU BTW and I have no code reader. Would it still be OK to get to work tomorrow? Cheers in advance