nissan primera p12 ecu read and reset

now let me get this right, or i n laymen terms. The orange light that looks like an engine is supposed to come on when you turn the ignition on, just before you start the car and then goes out when the car is running. As well as this light coming on the battery, ABS which goes off 2 seconds later, the oil light, hand brake light, and the air bag light which all go off when car is started except the brake light which goes off when you take the hand brake off. Only the ABS light is orange and no orange engine light comes on at the start

If it does not come on before starting, then yes, your light is not working. Then you can press the pedals however long you like, you're not going to get codes flashing.
You'd better get a cheap OBD code reader then. Or find a neighbor who has one. Or a local garage willing to help you out.

Edit: I don't think there is a separate fuse just for the MIL. but maybe someone else can tell for sure.

I have just purchased a 2003 SE and a little concerned that the fuel economy was around 26mpg after a round trip of about 100 miles (both city centre and motorway). The EML has been on constantly. I am trying to eliminate possible issues it is useful to reset the ecu. Thanks for the info on resetting the EML. After several attemps it finally worked.

No I did not.........I think it might have been a 3(but could be wrong)...........how do I find out what each represents.

Yeah, what he ^^^ says.
Chances are you will get the code back again. If and when it does, look in the EC section of the manual to check what each code means.