P0455, P1448 AND P0158 And a high pressure steering line leaking.

[lil754boy]

Can anyone enlighten me on these codes. I know the P0158 is the O2 sensor, but I have not found a absolute fix for the other 2. I have purchased the power steering hose. This car is driving me to drink. This is alot to have to repair at once.

[MinisterofDOOM]

Codes P0455 and P1448 are related, probably the same problem. P0455 is for an EVAP system gross leak, and P1448 is for the EVAP vent control canister, which is probably causing the first code.Here's the official diagnostic procedure for the P1448 DTC:http://www.nicoclub.com/Matt/P1448-02maxi.pdf