So frustrated that I'm thinking of selling this POS Z4M

[RossBMWZseries]

Here are the codes I pulled up. Too many in my opinion. I googled the codes, read some information but I still don’t understand what the next step would be or what code I should target first. I thought getting my own scanner would make things easier to work on my cars but I just opened a can of worms. Any help is appreciated!

I have Euro catless headers with a Section 1 (DKF S Pipe). Ran the EGT to the bung that came on the DKF pipe. I would think the 02 sensor codes are there because of that mod on the car. As for the EGT, I’ve read the code may come up if EGT needs replacement or based on location of the bung. As for the lighting, i have Ümnitza headlights, got the “bulb out” warning light on dash when I removed the OEM lights.

[longress]

I would guess you are right on the O2 and EGT codes and a tune would help to keep this from setting a fault.
All the general module codes are probably because of the Bus communication codes. This would need to be addressed first. Bus codes can be as easy as a blown fuse all the way up to a bad module. You will need wiring diagrams and an understanding of electrical testing.

[RossBMWZseries]

I basically need a new brain to understand this lol. I'm just going to take it in to a shop. Thanks for your help longress!

[longress]

Sure thing! Keep us posted.

[Vanne]

did you reset the codes first? id do that, then drive for a few hundred miles and re check it, see what sticks. id get that k-bus issue sorted first.

[RossBMWZseries]

Originally Posted by Vanne

did you reset the codes first? id do that, then drive for a few hundred miles and re check it, see what sticks. id get that k-bus issue sorted first.

I did reset ALL the codes about 4 weeks ago. I've been driving the car since then and decided to scan it again just a couple of days ago and the codes above is what i found. The one that keeps coming back immediately after clearing it is the one for the EGT. Not sure if it's stealing MPG's but it sure has felt like it in the past few months. As for the electrical gremlin, the code pointing at the Kbus would be the culprit, that's my guess but i am very uneducated on this topic. I don't even know what the next step would be. I'm using the same scanner to work on my 328i, I'm having better luck understanding that one only because it's a "running too lean" problem lol, my guess is it'll be the MAF. My main concern is the Z4, days are reaching over 100 degrees out here and my AC doesn't blow cold when that air bag light comes on.