Since buying my 2009 1.8TDCI Transit connect 18 months ago I have been plagued with apparent injector issues. First time the van went into limp mode as it would with a faulty injector so I got it towed and the injector replaced in cylinder 2. After that I have been going into limp mode maybe a few times every month however if i restart the engine a few mins later it seems to disappear. Codes were initially showing a faulty injector in cylinder 3 however I'm not 100% sure that is the case. I had to get a abs sensor replaced for the MOT and the mechanic said he had to repair a bit of the wiring also and this only fixed the abs issue for a short time. My ABS light now comes on occasionally and when it does come on the van idles rough and has a misfire then goes into limp mode. Thi only happens when the ABS light is on. I'm thinking it could be something electrical? here are the codes at present after the last breakdown.
P0704-64, P1203-61, P0490-A1, P0203-64, C1233-A0, C1155-A0
Not sure where to start so any advice would be very helpful