I have a 2004 BMW 330i car with 2 trouble codes: P0171 & P0172 = Bank 1 & 2 too lean.
What does this mean? How would it be repaired?
I thought it might be related to spark plugs because of a slight rough idle so I did an oil/filter change and replaced the spark plugs but rough idle still continues.
Sunday, December 26th, 2010 AT 12:23 AM