The engine check light came on again The car seems to be driving fine but there are 6 trouble codes:

17514.P1106
16554.P0170
16558.P0174
16689.P0305
16690.P0306
16684.P0300

Any help would be appreciated

Thanks

1996 Audi A4 V6 Quattro
118k

 

clear them and then report the ones that come back

 

I cleared the the codes and the onethat came back was:

16558.P0174

 

System too lean, bank 2.

Possible causes: air intake leak, fuel pump, fuel injectors, vacuum leak, exhaust leak, and evap canister.

I'd check your vacuum and intake lines first...those vacuum lines seem to be very prone to failure.