That sounds promising. A lot better than no fault found.
It is very promising, in fact I've just picked up the car and it has a new ECU installed under warranty. I also have the paperwork with a long list of troubleshooting by the mechanic etc(One of the scan faults was indeed 'P062E Fuel Injector Driver Circuit Performance. Bank 2')
Other codes were 'EPS DTC C1700 Byte Coding Error'. For anyone interested, I've attached the written report.
I have to say Customer Service was great and very helpful. Now I just have to drive it and hope it's all good..
As for putting the Racechip back in, I don't think so. I will look into perhaps getting in touch with the company and see what they say but at this stage I just need a safe & reliable car after all that gets me from point A to B