OBD Diagnostic Reader

[Cyberdactyl]

Hi everyone. I purchased a 2000 740i about 3 weeks ago and have enjoyed it immensely so far. It has 108k.

This evening I had my first worry. On the way home from work the “CHECK ENGINE SOON” light appeared. I know this is a OBD notice. I don't know if it could be weather related or not as it was about 25F.
I would like to determine myself what it is before I rush off to a mechanic. Can anyone recommend a simple and inexpensive OBD diagnostic reader? Thanks.

[lincolnmaster80]

$149 US. BMW will charge you about $75 each go, so use this baby twice, and it'll pay for itself!

R5/FCX-II - not the R5/FCX-II-16 cuz that will not work with the 2000 740i.

[Cyberdactyl]

Thanks allot. Yes, it will pay for itself in short order!

[lincolnmaster80]

You're welcome!!!

Let us know what you find out and what was causing the problem!

[Cyberdactyl]

I did find out. As I hoped, it was a fairly minor concern. I found code P1174 "System too Lean (Bank 2)".

Thanks for the help.

[lincolnmaster80]

Good job! It sounds like you know what you're doing.......

but...I'll comment anyway for other readers. System too lean (not enough fuel getting to the combustion chamber) can be caused by old/worn outfuel pumps, old and clogged fuel filters, a leak in the fuel line, or even knackered injectors.

Hope you get her running back to good as new!