for my next trick, i will be saving myself a $1500 expense in the RSX, using a $15 "O2 sensor spacer" bung that pushes the secondary O2 sensor slightly out of the exhaust stream to avoid the annoying p420 catalyst below efficiency threshold error and check engine light
the computer tries to be clever and test the cat for efficiency by monitoring the downstream sensor reading and comparing it to the upstream one. this cat is fine, it's probably something like 90% functional and the exhaust doesn't stink or anything. so i'm not about to plunk down 1500 for a new cat just cause it's not at peak efficiency for california air standards or something
woodland creature
in reply to woodland creature • • •woodland creature
in reply to woodland creature • • •woodland creature
in reply to woodland creature • • •woodland creature
in reply to woodland creature • • •don't tell the EPA but i'm pretty sure this only would be frowned upon in places like california. some people completely remove catalytic converters to make their cars go faster which really does cause the exhaust to stink. i wouldn't go that far.
the civic does need a new cat though and the exhaust does not smell too great, but it's not throwing an error