Check Engine Light Code 94 Table 07

[MTeam]

Hello Everyone,

The Check Engine Light just illuminated on my 1998 318 Ti. I checked the code with my Peak Code Checker and came up with the following:

Table 07
Code 28: Catalyst efficiency
Code 94: EWS Input

Any ideas what would cause these Codes, perticullarty the Code 94 EWS Input?

Thanks for any input,
MTeam