Catalyst Monitor NOT Ready P420 P0420 P430▶️Catalyst Not Ready For Emission Test 

Man smog is supposed to solve pollution but everyone is DRIVING A F TON trying to get these monitors on. That must be tons of gas WASTED at this stupid process.

I CAN NOT THANK YOU ENOUGH SIR!!!!! I've been working on completing this monitor for FOUR effing days! I have someone coming from 3 hours away to buy this car from me and I must have it smogged! It's a 1998 Ford Contour SVT; hadn't been driven in a couple months and when I went to smog, I smartly checked the monitors beforehand, only to find that the CAT and EVAP were incomplete. I knew I had to at least clear one of them...preferably the CAT. I tried EVERYTHING man...no amount of miles on the highway or streets would do it. I tried your trick holding RPMs at 3100 for about 3 and a half minutes...worked immediately. On Monday, I'll be happily on my way to the smog shop. Seriously, thank you so much sir! I will be subscribing and following you from now on...so much appreciation and love for you man.

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Just followed your advice and worked like a charm! Thanks a whole bunch, man!!!

Very good video man thanks! Good job

Tysm 🙏🏼🙏🏼🙏🏼👏🏽👏🏽 it cleared 😁

I set the Catalyst Monitor last night using your suggested method of driving over 55 mph at a constant speed. I drove about 30 miles on the freeway (roughly 10 miles from my work to home and made a loop back to work then back home) at 65 mph. Got home, checked the scanner and boom! Catalyst monitor is ready.

I normally undo the 02 sensor and spray electric contact cleaner in leave it 20 mins and then go fir a drive done it a couple of times now with success every time

Hello, first off love the videos! Very informative. I do have a question. The only monitor I show incomplete is Cat on my OBD reader . I tried method from one of your other videos with keeping the RPM's constant at 3000 for 3 mins but does not seem to do the trick. I still have an incomplete cat. I do have a p0421 code. What is the best way to get the Cat monitor to Ready? Should I try the Cataclean method? Or will it never go away until I resolve the p0421 code? Car is a 2008 Mazda 6. Thanks in advance!

I tried everything to get my catalys monitor to say ok. I tried for 10 Days. Finally, tonight I used the Cataclean, I followed the directions and it totally worked, My catalys monitor finally says ok. I’m so relieved.. thank you for sharing your video.

I have a 2003 Subaru Forester and I’m having trouble getting my CAT monitor to clear to be ready to smog. I’ve driven it a ton of miles but still not ready. Someone suggested changing the 02 sensor . Could changing it allow the CAT monitor to read ready? Any suggestions are much appreciated!

I just bought a BMW Z3, I work on BMW's and I've never had this problem, I've driven about 1000 miles, done the full drive cycle around 6 times(Usually works the first time of not the second) and the cat still won't get ready, when I bought the car the cat was ready but it had a vacuum leak, so I fixed it and deleted the codes, but now it won't get ready.

My reader is an innovative 3100. I have a diesel, my reader has the 'C' monitor (catalyst) flashing, meaning not ready. I wasn't aware they had catalytic converters on diesels.....

I have a 2004 Acura I have the same problem but it doesn’t seem to work went by 2 inspections and still no luck

I read to drive the car in all driving situations but... run on highway at 55+ 60 as long as needed to pass cat system test. evap system 65 mph then drop to zero. do both a few times. it takes awhile on catalyst driving.

Would u recommend to swap some new spark plugs on or use the ones already in the car? Would it help out the process?

I/M status: Cat not ready. (No codes, no errors.) Did this. 3,000 rpm 3 minutes. Scanner says CAT INC (Catalyst Monitor not ready). Did again. Same result. Smog pro said: engine coolant must be at 220° or higher, on the edge of overhearing. Put cardboard in front of radiator fan air intake…) Will try and report back.

My wife have a 2002 Toyota 4Runner & have Cat No registert on Computer?, What can I repair to past the Smog? Thanks !

If there's a catalytic converter issue that's keeping it from re-setting, will it throw one of those codes? Having trouble re-setting, but I don't have any codes, and don't want to go through the cleaning processes if it isn't because of that, if I maybe just need to keep trying the Drive Cycle more times.

Question if all my system monitors are ready but i have the p0172 code if i reset or desconect the battery my monitors will be inclomplete?

I have a V6 accord and recently just replaced both cats. I'm at over 200 miles since resetting the CEL but only the O2, O2 Heater, and EGR are ready. EVAP and Catalyst are still showing not ready. Any idea why?

If the vehicle won't start what are my options for getting it running so that I can possibly address the issue

I have a 2009 bmw 328i e90 and it shows HCAT not ready with a p2096 code Everything else ready Any help?

Hey my car have pcd, and have pending codes of P0420 and P0430, if i clear the codes and drive as what the youtube told, will i pass? EVAP not ready and monitor catalyst not ready

Would enhanced gm codes cause the readiness monitors from completing? My catalyst and evap wont ready and general obd 2 on my scanner says no codes. If I select enhanced gm it shows PO703. I have the parts to repair but am concerned to pull the battery and start this saga again.

Getting a P0421 code on a 2008 Mazda 6. Will clearing code, completing a proper drive cycle help pass smog test?

Hi do you know what it means when it says 'Cat N/A'?

Can you pass with only 1 monitor unset and that monitor being the catalyst monitor?

I just got my 2.0 gasoline 03 Jetta smogged, and the readout says "Catalyst Not Ready". Everything else was either Ready or Unsupported. Did the tech fudge something to make it pass?

I have replaced cats with aftermarket cats and it's taking very long time to set catalyst monitor any suggestions

Ive done everything and its still not ready... I wonder if there is a cheat around it.

I/M status: Cat not ready. (No codes, no errors.) After driving over 750 miles in 2 weeks. Did this. 3,000 rpm 3 minutes. Scanner says CAT INC (Catalyst Monitor not ready). Did again. Same result. Smog pro said: Engine coolant must be at 220° or higher, on the edge of overheating… Put cardboard in front of radiator fan air intake… Try drive cycle again…) Will try and report back.

04 matrix . only my cat I m is not completing ?? I have a p0420 pending. Will the catalyst i m still complete???

So how long should i drive after using that cati clean ??

Engine light is on does it matter or should i have a guy use one of those to turn it off first

my 2005 nissan altima didn’t pass . catalyst : not ready Evan: not ready O2 send: not ready would driving at 55 for some miles help me pass inspection????

If I install fooler will my catalyst im still complete for smog check????

This is so frustrating..

Thanks I'm going to try to the cats lean and spray seafoam in the upstream sensor hole, my truck has 300,000 miles 20002 Toyota tundra. I've replaced o2 sensors check light went off but now I got the OBD Cadillac. I don't want to have to buy a new catalytic converter because I don't have the money and I've been doing the work myself, I live in Las Vegas I'm going to add the seafoam inside the o2 sensor hole and cut it clean fill up my gas tank and drive to mesquite which is 100 miles and then drive back hopefully this passes my smog this truck as soon as it hit 300,000 miles everything started breaking down that I've replaced myself alternator fan belt fan belt pulley starter fuel pump brake booster everything my friend thank you for the info if I don't forget and it passes I'll let you know thank you

What if there is no pending codes but the Catalyst Monitor is still not ready? What next? I drove for 101 miles. Thanks,

Hey I found out that simply revving your engine for at least a minute straight while in park or possibly neutral will clear the monitor. No driving required! I wasted quite a few hours driving and revving worked right away. Try it next time.

Battery had died.96 accord. I've done the cycle 3 times. 150 miles I have everything reading but cat. No codes.

My 02 sensor code is ready my cat and evap is red2002. Nissan maxima

Any clue why a CCM monitor will not get ready? No trouble codes and it’s only the monitor that wasn’t ready. Before this I couldn’t get the CAT and 02S ready but got the issues fixed and after the repair the CCM was the only monitor that doesn’t get ready

Are you familiarise with p1093 bmw need help

Omg mine was not ready for ages , I’ve being using better fuel and fuel injector cleaner and it’s now green and ready holy fuck it worked

How often does the catalyst monitor run a diagnostic?

what if 2000 camaro has low mileage under 15000

Driven my wife's Honda over 600 miles now and the cat is still not triggering... Any advice anyone?

Smog

What about a Permanent code. P0420 permanent code??? Please address having a PERMANENT code.

will this work on 2000 camaro

There's a spark plug in the cat????

P0430 but my cat is ready and my O2 is not

My code will not even delete

What about you just got a 02 not really

Don't use vinegar.....too acidic

In order to pass emissions test, you must drive a lot of extra miles at a high rate of gas usage... So emissions law is designed to maximize fossil fuel pollution. Lol