3-Series (E46, E90)Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.
I have a '99 323i with 170k miles and there are some problems that caused the Check Engine light to stay on.
I read the codes with a standard OBD2 reader and I got:
P0735 gear 5 incorrect ratio
P1189 and P1250 something related to air/fuel ratio.
1. what kind of tool should I use to get more in-deep information about what is going on, beyond what the OBD2 protocol is able to tell? For VW I have a product named VAG-COM that is able to diagnose all car systems, not only engine related. I would like to have something like that for my BMW. I found many products on eBay like Carsoft, Ediabas etc with prices ranging from $20 to $500. Which one has a good price/quality?
2. what might be wrong with my car? air flow meter? oxygen sensor? what's the part that fails usually on these cars?
well ill try to help... the iat sensor is no a problem unless it is not responding also about the codes on the air/fuel ratio it sounds like an 02 sensor since u got misfires in the last three cylinders cus theres a o2 for 1 three cyl and another one for the last 3 wich is the ones your haveing problems with... the wierd thing is that there is usually a code for an o2 sensor code that is set for o2 sensors. if its not the o2 sensor id try an injector flush and id check the spark plugs... if you could provide more info on the codes and what it said exactly on the scan tool...
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