Land Rover Repair: RPM, t4 system, roversnorth

Question
I have 96 Discovery SE7 and recently I am experiencing some RPM issues.  The idle some time goes all the way up or drop to zero and it dies.  The Auto Zone folks ran the ODBC test and came up with these codes:

1. ECU A/D Converter
2. Key line voltage
3. EGR Drive Overcurrent
4. Key lin voltage

Do you think the main computer's ECU went bad or defective and all it's related to Main ECU?
Any help regarding this will be really appreciated.

Thanks,
Rak

Answer
I think the generic code reader at Auto Zone has given you incorrect information.  Find a shop with the Autologic, the Rovacomm, or the T4 system and see what's wrong with your truck.

The codes you are showing do not make sense

If you don't know where to look for a qualified shop to fix your Rover, look on www.rangerovers.net under "repair shops"

Here is a link to a magazine atricle I wrote 2 years ago on choosing a shop for your Rover:
http://catalog.roversnorth.com/downloads/thenews_pdfs/NSP94_pg2.pdf