SUBARU COMPUTER READ CODE

My Sabaru Recieved Three Dianostic Code Readings. Can You Tell Me What Speciifically Needs To Be Fixed? 1. Po420 (orange Light) - Catalyst...

I Tried To Connect To Read My Check Engine Code, But It Does Not Want To Connect. I Tried With Two Scanners And Still Does Not Want To...

I Have A 91 Subaru Legacy L+ With A 2.2 L Mfi Engine, With Distributorless Ignition. It Runs Fine At High Rpms, But Idles Rough. The...