vauxhall Astra 1.6 - engine management control unit - cathymac

hi,I have been told I need a new ECU at a cost of £850,no fault codes found but warning light came on and car was sluggish (losing power but still driveable-ish) cleared all old codes memory to see if that would work but fault light came back on and old codes are all reloaded...........................................................is this the likely cause or could there be some other reason .......................any help appreciated as need to decide whether to fix or sc***

vauxhall Astra 1.6 - engine management control unit - cathymac

just checked the book and it's the engine electronics/immobiliser light that came on and the engine struggled ,for a couple of days it was intermittent but yesturday it stayed on ..........................however it is now off again had diagnostics done and it just brought up old codes/faults ,got this cleared but after a short run the old codes were back on ,but no new ones ............................

vauxhall Astra 1.6 - engine management control unit - topbloke

pls post the codes and then we may have a chance of helping, an engine code and a year will also help,Regards TB

vauxhall Astra 1.6 - engine management control unit - cathymac

sorry for delay,not got codes as garage would not tell me them so having another test done tuesday ,will add codes then,have e-mailed bluestreak to check out prices and timeline for ecu to be done , ( I need my car desperately for work asap) if that really is the problem ,one minute it's ok /next it's sluggish/loss of acceleration/power

will get back with more info as soon as poss,thanks for any help given ,all is appreciated