2004 Renault Scenic 1.4 Petrol, Low Miles in Scarborough, North Yorkshire for sale

I have here our Renault Scenic 1.4 petrol car, this is a 2004 model in Blue with low miles, 62799 in total, and is all round in good condition for a family car and its age with obvious signs of use and scratches here and there but nothing major and no rust, underneath is very tidy indeed, there is part service history with receipts for work carried out recently, December of last year it had a new Clutch, Cam belts, new battery etc all the major stuff is done receipts to prove, Now for the reason for selling, we intended to keep this for a few more months and then sell with 12 months MoT, an issue has recently appeared where the computer is telling me to check the injection and the car is flat on the acceleration and struggles to start, I have been to the local garage and they will charge me just to plug it in to the diagnostics machine and check it all over with no time frame on how long it takes, and honestly don't want to spend money on the car when we have no intention on keeping it so we have best decided to sell it with 3 months Mot, this may be a real simple fix I don't know, the car is good to Drive everything works as it should, the computer does also say Check ABS but I bought the car with that and its never been a problem. Any questions please ask.