I have a 99 audi a6 quattro and i was driving in a city i was not familiar with and the only gas station available was so i tell my girl to go put gas for me and she ends up putting 89 octane i always put 93 octane. the nect day i was driving on the highway and my check engine light went on. i ended up going to autozone and it gave the p0432 code... has anyone had this issue and what was done to resolve this is their a temp fix so i could just get my car inspected.