P1093 Code
 

All: I am getting this code that the fuel to too lean on bank 2. I have replaced all parts directed to this code: 02 sensors pre-cat, disa valve, elbow tube, fuel relay switch, fuel filter, MAF sensor. What about the fuel breather vent or fuel tank corrosion. Somthing is fishy here.

The dealer has no clue what it is after $567 and still CEL. I have had 2 engine flushes and 4 cans of additive. I will add one more can of additive. Any suggestions. The car sat too long I know in Texas heat -- it was a repo. I have also replaced the TCU got damage also from sitting that long. Anyone with any advice -- the dealer can't even help.

Should be a vacuum leak of torn intake boot of some kind.

They smoked it. No vacuum leaks. We are out of options.

ECU re flash?

I don't know what this is. They reprogrammed the DME twice. What is the flash?

A rich condition could be caused by several things. You could have a faulty fuel pressure regulator a leaking fuel injector or even a clogged air filter. There are a couple of service bulletins that pertain to rich mixture faults but without the BMW fault code. It could be a programming issue

BMW cannot detect an issue. Is the faulty fuel pressure regulator the fuel breather vent that plugs into the throttle body?

Flash=reprogram

I am wondering,where did the Original Poster mention that he had a Rich mixture?

P1093

Pre-Catalyst Fuel Trim Too Rich Bank 2. Hh.

Did I mention anything about a code itself?
I mentioned about an OP.

Alright, I don't know if that code is rich or lean.
But if it us just one bank it has to be something that effects only the one side. So fuel pressure and anything in the intake before the throttle is out.
You have tried a number of things. My next step would be checking the fuel injectors, if it was me at least.
But if it is at the dealer, why are they giving you generic obd codes not BMW specific codes?

That's exactly what I think,why go generic if you should have a specific one handy.

Well, the dealer told me to put the BMW Fuel Additive $16 in the tank at full level and to add a second a full level and the light has since cleared itself. They found nothing mechanically wrong with it and they got BMW to assist in the diagnosis. My guess is the vehicle was bought as a REPO and I believe it sat somplace and built up carbon and who know what in the engine and the injectors. Worse case scenario I've been told is that I will need a Catalyst Converter. No codes for it yet though and I won't be replacing Bank 2 anytime soon as the vehicle only has 77k miles on it. Thanks everyone for you input.

Hi, I know it's been a while, but did the code ever come back