2000 Celcia GT throwing codes...emission issue

[Jamie_Murray]

Car starts every time and runs good. If you listen closely to the exhaust you can hear it miss every now and then.

It's throwing codes:
PO171
PO101
PO420
PO440
PO441
PO446


Any help would be appreciated!

[RobMilkshakes]

P0171 system too lean bank 1
P0101 Mass or Volume Air Flow Circuit Range/Performance Problem
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
P0440 Evaporative Emission Control System Malfunction
P0441 Evaporative Emission Control System Incorrect Purge Flow
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction

The first thing I would think of would be a vacuum leak may be a source of some of this. It may come down to being one issue or a combination. Did the codes just surface all at one time?

[Jamie_Murray]

Originally Posted by RobMilkshakes

P0171 system too lean bank 1
P0101 Mass or Volume Air Flow Circuit Range/Performance Problem
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
P0440 Evaporative Emission Control System Malfunction
P0441 Evaporative Emission Control System Incorrect Purge Flow
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction

The first thing I would think of would be a vacuum leak may be a source of some of this. It may come down to being one issue or a combination. Did the codes just surface all at one time?

I've had po101 and po420 for quite some time. The CEL has been on since I bought the car so I'm not sure when the new codes popped up...

[hatchy_gt-s]

Looks like someone did a # on your fuel system, you should clear them and see if they come back. If they do come back I would check your charcoal canister and fuel vapor system. For now I would look for vacuum leaks and see if there is anything down ur intake ie rag, cloth, rat nest, exe.