Codes 17544 & 17546 '98 A4 2.8 30v

[mxhowes at aol.com]

 '98 A4 2.8 30v
Just started to get a 17544 & 17546 thrown at me recently. (Bank 1 system too lean) the same for bank 2. My A4 is well maintained and just shy of 200K miles. No other engine codes show up. I've cleared it two other times and it only takes a day or two of driving to come back on.
 
Thanks in advance,

Jim

Down to 1 Audi  and a '96 Golf 2.0