Won't pass emissions test. what is the catalyst evap?

Check out the videos. Also drop a bottle of Fuel System Cleaner to a quarter tank of gas.

https://www.google.com/search?q=O2+Oxygen+heater+incomplete

Guaranteed To Pass® Emissions System Cleaner, 12 Fl Oz

https://www.crcindustries.com > products > guaranteed-...
With a "double your money" guarantee if your vehicle fails the emissions/smog inspection after use, CRC Guaranteed To Pass® is the trusted choice in emissions ...

CRC Guaranteed to Pass Emissions Test Formula, 12 Fluid ...

https://www.amazon.com > CRC-05063-Guaranteed-E...
GUARANTEED TO PASS EMISSIONS SYSTEM CLEANER contains powerful detergent additives strong enough to remove harmful carbon and varnish deposits from the fuel ...
Rating: 3.9 · ‎2,090 reviews

CRC Guaranteed to Pass Emissions Test Formula CRL 750606

https://www.napacanada.com > CRL750606
CRC Guaranteed to Pass Emissions Test Formula - CRL 750606: Available online or at your local NAPA Auto Parts store.

These are two separate systems. Catalysts and EVAP. Codes help.

You have 8 I/M or Emission Monitors that have to run clear
BEFORE you can go to inspection

Your Catalyst Efficiency comes from the switching comparison
of the front & rear oxygen sensors being out of range

Until you resolve the rear O2 Sensor Heater Issue you won't
know if the cat is good or you have other problems

You need professional scan tool software & a long road test
to even find a problem,then component test,which apparently
wasn't done when they hung the new rear sensor on based on a code

broken evap line/port on fuel pump. Or leaking fuel pump o-ring
check the EVAP canister it is right next to fuel filter could be pcm needs update to fix false codes. Here is a old hillbilly trick that may help put saliva on the seal of gas cap when you fill up every time that may work for you.

Evap could be numerous things need to smoke test it, catalyst effiency code? could be a leaky exhausts or need to to a pin point test for best results

Error Code: P0440
Fault Location:
Evaporative Emission (EVAP) System - Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Soution:
Check Evaporative Emission (EVAP) System Sealing.
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .

Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Solutions:
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Perform Output Test.
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .
Check Evaporative Emission (EVAP) Canister.
Perform Basic Setting.
Check Pipes between Tank Breathing and Throttle Body.

Error Code: P0446
Fault Location:
Evaporative Emission (EVAP) System, Vent Control - Circuit Malfunction
Possible Cause:
Wiring harness.
Evaporative emission (EVAP) canister purge valve.
Engine control module (ECM).

Code 455 is for a large leak in the evap system.
The computer vents the gas tank to the vapor canister by opening and closing valves.
Have you checked the evap system for leaks ?

it's the rubber T-Fitting .....in front of intake under supercharger

Every time you reset the light or disconnect the battery it completely resets the system and it has to go through EVERY test again. The O2, EVAP, and Cat tests are generally the LAST THREE tests that are tested. You're not doing yourself any favors here.

Essentially what these readiness monitors are is the computer's notation that his has run the self diagnostics on each system and that the results feel into the expected results. If it is outside the expected results the computer will generally try to run the test multiple times before setting a DTC and turning on the Check Engine Light. It cannot set the status to "Ready" until it has a successful test within expected results; sometimes multiple successful tests. Sometimes, the tests need to run at different speeds - so the vehicle has to be driven not only at freeway speeds, but also city speeds for the tests to complete properly.

The O2 test MUST complete before the Catalyst test can run. The EVAP test generally requires that you have your fuel level at between 1/4 and 3/4 and that the vehicle sit undisturbed after being driven for a period of time for no less than 8 hours in order to run the EVAP test.

The same can be said for the O2 test sometimes because the computer needs to test the O2 sensors reaction to heating up and cooling down. Eventually they will all complete - unless there is an issue. I have seen where a component was in the process of going out and the computer was getting both GOOD and BAD results when running the tests. As a result it wouldn't set ready status because it wasn't getting the concurrent GOOD test results.

As a Texas Recognized Emissions Repair Facility - my shop sees this kind of stuff all the time.

Good Luck.

This Usually means that the Catalytic Converter is Bad and needs to be Replaced as the O2 Sensor is On the Exhaust System and the Evap is Detecting High o2 Levels. Please Rate My Response! Thanks!