[mastershake]

took the alero in today to get the cat converter changed (p0420 code) and had him test the oxy sensors before to make sure the downstream wasnt just being lazy. oxygen sensors turned out to be working just fine. so then he took it around the block to heat the cat up and then scanned it with an infrared temp scanner. that looked normal too. he has no idea why its throwing a p0420 code, and im starting to get pissed LOL

so im taking it back in wednesday to get more tests done (free of charge)

but in the mean time any ideas??? no rotten egg smell or loss of power, but he did pull up a misfire on cylinder 2 which went away