need DTC's decoded

[Douglas Frank]

Can anyone tell me what the following trouble codes mean?  (Car is a '98
A4 1.8)

16684  P0300  35-10
16688  P0304  35-10

thanks!
--
Douglas Frank  DigitalWhoopsCompaqImeanHP Co.
ZKO            110 Spit Brook Rd.       These are my principles;
603-884-0501   Nashua, NH USA 03062      if you object... I have others.