Re: 96 318ti check engine

hey thanks for the reply..

the first code i had was 0420.

catalyst system efficiency below threshold bank 1.
then i bought 2 o2 sensors, and replaced them, then i cleared the check
engine lite.

i stayed for about 2 hours then these new codes flashed.

but before i changed the o2 sensors i changed the exhaust system.

so what do you think

.