Quote:
Originally Posted by Critical Drew
I've had my 2003 4.4i X5 for about 2 years now. With the exception of an alternator replacement I haven't had any running or driving problems. The other evening I saw that my "Service engine soon" light had come on. The vehicle seemed to be running and driving normally and nothing was displayed on the information screen in the cluster.
I scanned the computer the next day and found that it was an error for Engine running too lean at idle, Bank 2.
I cleared the code and went on my way. 2 days later the light is back.
Is anyone familiar with this fault and its usual diagnosis?
The vehicle cracked 100,000mi almost 1 week prior to this light coming on, but as I said earlier everything is operating normally.
Where should I start looking for the culprit(s)?
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It will run OK as it is emissions related. The first and easiest thing to check (you may have done it already) it to check the connectors of the O2 sensors. The engine running lean could be a bunch of fuel related things including Fuel Filter, Fuel pressure regulator, O2 sensors, etc. The engine is just not getting the appropriate amount of gasoline for the amount of Air in the chamber.