amar7613

Getting all those codes currently but no hoses on air filter box disconnected Also getting a knocking from what I think is the fuel injectors. *tap tap tap*

weikk

you were on spot with the disconnected vacuum line, several weeks ago i checked the air filter and must of loosened the line, just connected it and going to take a drive for a beer, hope it's gone while i'm driving, don't want to disconnect the battery now, i am hoping it'll reset itself in 15 mins, should be enough time for me to drink 2 bottles of bass ale thanks much for your knowledge

berto527

Did you get that fixed? i have the same problem, i changed out my spark plugs and got those 3 codes with the tapping sound. i'm going to re tighten the spark plugs just in case one got loose. any advise will help. thanks

Lexmus

berto,
Check if the evap hose has come off the vertical tube behind the air filter box. Happened to me last week when I changed the air filter.

tmf2004

iTrader: (15)

I've had the same code P0446 for months now and i just clear it from time to time. I also get a exhaust type carbon smell from the engine bay that comes and goes. Could that be a catalytic converter going bad or clogged? My mechanic says the same thing that its the charcoal canister in relation to the code that pops up.

Phantom410

I would check your flex pipe and manifolds for exhaust leak. The flex pipe would be a more likely suspect since it's more exposed and tends to rot away much faster, and leak exhaust into the engine bay

tmf2004

iTrader: (15)

i'll have my mechanic check that out next time.. thanks

Sin1UZFE

Do you need to remove the airbox to get to it?

Lexmex

No, you can reach behind and grab it.

Sin1UZFE

Richard14

Where is this problem solving hose located on the RX300?

salimshah

This thread post #3 describes a common source/cause of the problem.

Vacuum diagram sticker is in the engine bay and can be used as the guide for other possible leak locations

Salim