I just bought a 97 328is with 100k miles. Before I can register it, I
need to pass emmissions. The first time I went for a test, it failed. I
got it diagnosed and got an estimate. They said that I needed 2 new 02
sessors in bank 1. They also recommended that I run some sort of
cleaner through the cat to get rid of the carbon, i believe.
I replaced the sensors and cleaned the carbon. Had a retest, but the
computer aborted. They said I needed to drive it more for the computer
to reset. I drove it for another week. At least once a day from hot to
cold, about 10 miles each time.
Now- I have 20 drive cycles. Went to have a retest at a different
garage. The computer aborted again.
I have one mechanic telling me to replace the cat
I have another mechanic telling me to drive the car more because I need
to flush out the cleaner I put through the cat.
Does anyone have an opinion?