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I successfully cleaned my 200,000 mile CAT, which through a P0420 code, with brake cleaner and a strong grill degreaser followed by a heavy water rinse. The sub-strait was intact, and the code has not returned. Also, I switched to Shell gasoline instead of the cheap quick-mart brands. I read that 5% blocked CAT can through the P0420 code. Hope this helps someone.
I successfully cleaned my 200,000 mile CAT, which through a P0420 code, with brake cleaner and a strong grill degreaser followed by a heavy water rinse. The sub-strait was intact, and the code has not returned. Also, I switched to Shell gasoline instead of the cheap quick-mart brands. I read that 5% blocked CAT can through the P0420 code. Hope this helps someone.
I just replaced my front calipers on 2000 4Runner with an after market brand, to which I was discussed with their dust boot retainer- didn’t fit snug at all! So I returned it and got OEM calipers- no problems :woohoo:
I just replaced my front calipers on 2000 4Runner with an after market brand, to which I was discussed with their dust boot retainer- didn’t fit snug at all! So I returned it and got OEM calipers- no problems :woohoo:
Just replacing your CAT with an after market brand is sometimes unsuccessful, cause the computer is looking for specific tolerances that only the OEM will give. Use an impact on the nuts, and get a look inside if the substrate is intact. Trust me, cleaning it this way is more profitable in saving $$. If the substrate is broken, that’s your problem! Best of luck. 😛
Just replacing your CAT with an after market brand is sometimes unsuccessful, cause the computer is looking for specific tolerances that only the OEM will give. Use an impact on the nuts, and get a look inside if the substrate is intact. Trust me, cleaning it this way is more profitable in saving $$. If the substrate is broken, that’s your problem! Best of luck. 😛
As I said before, not many people seem to believe this, my 2000 4Runner had P0420 code, and I dropped the CAT with a thorough flushing clearing my problem. Of course make sure the substrate in the CAT is intact. New OEM CATs are very expensive! I also poured a bottle of Mr Gasket’s Cataclean. :woohoo:
As I said before, not many people seem to believe this, my 2000 4Runner had P0420 code, and I dropped the CAT with a thorough flushing clearing my problem. Of course make sure the substrate in the CAT is intact. New OEM CATs are very expensive! I also poured a bottle of Mr Gasket’s Cataclean. :woohoo:
I used Brake Cleaner, flushing it well, then Grill Cleaner De-greaser letting it soak for several minutes. Back flowed with lots of water, then dried it very well. Inspect sub-strait before attempting this. Still running fine with no codes too. I started using Shell gasoline now. [quote=”mitmaks” post=83212]Which solvent did you use? I was thinking maybe I can use simple green or something in the bucket and let it soak overnight.[/quote]
I used Brake Cleaner, flushing it well, then Grill Cleaner De-greaser letting it soak for several minutes. Back flowed with lots of water, then dried it very well. Inspect sub-strait before attempting this. Still running fine with no codes too. I started using Shell gasoline now. [quote=”mitmaks” post=83212]Which solvent did you use? I was thinking maybe I can use simple green or something in the bucket and let it soak overnight.[/quote]
Take the timing cover off and inspect the belt very well. You are pushing your luck at that mileage…just change it and be done!! 😛
Take the timing cover off and inspect the belt very well. You are pushing your luck at that mileage…just change it and be done!! 😛
I had a P0420 on my 2000 4Runner. Removed the CAT and made sure the sub-strait was intact, then back flowed the CAT with solvent and water. Much better now no codes!![quote=”bsr2002″ post=80835]Hi all, my first post!
I own a 1998 Chevy Lumina with 3.1LFirst a little history. I’m driving along and I get check engine light, I use my scan tool and I get P0401 EGR code. I clean out my throttle body and EGR and the check engine light clears itself! Cool, I say!
A couple of weeks later, I’m driving along and the check engine light sparks on again! I run my scan tool and now I get P0420 code…
So I got online and found The Eric The Car Guy vid on diagnosing P0420.I followed the vids instructions and this is what I got…
1. When I run my infrared temp gun I get 288 on the front and 497 on the back.
2. On my live data it looks like the downstream sensor is changing rapidly like the upstream one.
Now my question: Since the temps looked good and the data scan was bad, do you think it might be the downstream sensor?[/quote]