I would do what Mark does normally, but since I don't have a clue what those meant, I would call up my friendly tech and ask

 

There will be an erase button on the code reader, consult your manual, im certain it will be able to erase if it can read.

 

I'd post this in Under the Hood!

 

Its odd that you have so many different problems, which suggests to me that the error codes are false. I would look towards the ECM for the problem which could quite possibly be just a fuse. A lot of the faults can be caused by low voltage or no voltage.

The first step I would suggest is checking every single fuse in the under-dash fuse box.

If every fuse is okay, then you are going to need a voltmeter to diagnose further.

I will look further to see if there is a single point that can produce all of these error codes.

 

Check fuse No.8 ACG....it would explain P1298, P0412 and P1412.

 

I've just got this info, which seems to match what Andy says above...

These are all codes to do with the ECU.

Check connections to the ECU, dirty connections, coroded wires etc.

You could try another ECU in it.

 

When I was having probs with my beemer, my mate (who knows what he is doing) plugged in his reader and looked at the codes. He then reset them and turned the ignition back on, to see which appeared with just electrics and then started it up to see what codes posted with the engine running. Some codes may have appeared as a side effect of the first problem, so getting an idea of which appear and when can help in determining the root cause.

Good luck!

 

Thanks guys, I will check the wiring of the car over the bank holiday weekend.

Have also posted a thread in 'under the hood' forum.