Find help: what is a catalyst? - Help.com

Try doing a Google image search. Type in “catalyst car” and then “EVAP car” …Google Image Search may come up with some decent diagrams and images that could help explain these parts for you.

You have not told us where you’re from…. so I’m gonna hazard a guess.. USA?

I’m from Norway and know nothing of these On-Board Diagnostics systems you have implemented over there, but it looks like it’s got something to do with keeping the emissions down. Maybe an andvanced tailpipe emissions check?

……. I do know how to use Google however…..

EVAP (evaporative emissions):
The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle’s fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

The Catalyst thing:
Perhaps this means that the oxygen sensor downstream (after) the catalytic converter on is detecting that the converter is not working as efficiently as it should be (according to specs). this it is part of the vehicle emissions system

use this link for more info on your codes
http://www.obd-codes.com/trouble_codes/

What does “Ready” vs. “Not Ready” status mean?
-Ready - the OBDII system has checked this emissions control system.
-Not Ready - the OBDII system has NOT checked this emissions control system.
-N/A or N/S - the OBDII system is not required to check this emissions control system.

1. Start the engine. Idle the engine in drive for two and a half minutes with the A/C and rear defroster on.
2. Turn the A/C and rear defrost off, and accelerate to 55 mph at half throttle.
3. Hold at a steady speed of 55 mph for three minutes.
4. Decelerate (coast down) to 20 mph without braking or depressing the clutch.
5. Accelerate back to 55 to 60 mph at ¾ throttle.
6. Hold at a steady speed of 55 to 60 mph for five minutes.
7. Decelerate (coast down) to a stop without braking.

Something which speeds up a chemical reation i.e. heat would be a catalyist to dissolve sugar in water.