F83 M4 fault code help - CEL

[phantome46]

So had a few issues with my M4 starting with the Headunit/Nav being random and resetting - another story. But I decided to replace the touchscreen with the 10.25 Android unit with wireless car play and its awesome, had no issues ever since.

But before this car went into the stealer to have a service and I asked them to have a look at it and see if it threw any error codes.

When I returned to get the car they had kindly reflashed my ECU and wiped my tune and the car was stock

So had to have the tune put back on the car and as have downpipes had the CEL coded out. Well thats what I thought.

I then treated the car to some new plugs and gapped them to 0.022 for the tune and the car runs as sweet as ever.

But now the CEL light has come on.

I have used ISTA+ to read the fault codes and have the following:
12B304 - Oxygen sensory heating after catalytic converter,activation: line disconnection
102A11 - Hot film are mass meter 2, Signal Electrical fault
102A01 - Hot film air mass meter, signal: Electrical fault
B7F809 - Connection of headunit to DAB Band III aerial: line disconnection
B7F8C3 - Connection - headunit to CID: No communication

Could i ask if anyone has had any of these issues before and if there is a fix? Maybe I’ve disconnected something and not plugged it back in properly

Car is flash tuned, downpipes with cats removed, standard air box

[sna66]

What turn BM3? You can probably use it to suppress the code for the o2 sensor idk about the others, can you elaborate on how you installed the android head unit? I have I-drive 4 and was interested in something like this

[mmmmQuattro]

sounds like the codes are related to your mods

[phantome46]

Codes are all recent and never existed before mods been on for nearly 3 years. Only work done recently is spark plugs