Diagnostic error codes || which ones are critical ?

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DRK002

Active member
Joined
Apr 22, 2018
Messages
28
Hi fellas
Appreciate it if you can go through this error list and tell which ones are fatal and which ones are harmless. These are of a vehicle I took for a diagnostic test today (prospective buy) I posted about the same vehicle last week as well (http://www.mybmwi3.com/forum/viewtopic.php?f=3&t=5263)

jKmrx8
https://ibb.co/jKmrx8
cucWx8
https://ibb.co/cucWx8
i6TtAT
https://ibb.co/i6TtAT
n2VvPo
https://ibb.co/n2VvPo
cUVJc8
https://ibb.co/cUVJc8
kviFPo
https://ibb.co/kviFPo


As you can see from the pictures there were 49 outstanding errors and I suspect some of those are due to bad 12v battery. But the question is which ones are major errors and which ones are trivial ones. We cleared all fault memory and had a brief test drive (about 4 kms) to check whether any errors reappear after driving. Only the following three codes reappeared even after the test drive

8040BD Terminal 30F reset or deactivated
804398 Automatic air recirculation control (AUC) sensor: line disconnection or short cct,
804399 Automatic air recirculation control (AUC) sensor: Invalid PWM signal

gmjuH8
https://ibb.co/gmjuH8

I guess the two about AUC sensor are minor ones though I’m not sure about the one about Terminal 30F.

Appreciate it if anyone of you who are familiar with these codes can share information about those. I want to know the scale of what I m going to get into and gotta decide whether to steer clear from it or to make the plunge.
 
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