Software update to correct false catalytic converter failure on Toyota RAV4

Problem Description and Possible Solution

Toyota released a software update to fix a problem that caused the Check Engine Light to come on. Before the update, the computer would report a problem with the catalytic converter when there wasn't one.

Problem Data
RepairPal Verified
Average mileage: 140,919 (75,000–200,000)
3 model years affected: 2001, 2002, 2003
48 people reported this problem
Viewing 1 - 16 of 16 comments
The check engine light comes on. It indicates the converter needs replaced inorder for the car to pass PA emission inspection.

I checked with my local Toyota garage and they said there isn't a software upate to correct the faulty check engine light.

Can someone give me specfic info that I can give to the garage?
Had the catalytic converter replace, 5 months later check engine light again for catalytic converter failure and replaced it again.
Had my 2001 Toyota RAV catalytic converter replaced by a Toyota Dealership. Six years late at 178,000 miles I was told the cat converter had to be replaced. exactly 2 years later and at 192,890 miles, check engine light comes on and being told cat converter again.
Check engine light had come on around 168,000 miles. Took it to a shop to turn off the light and see what happened. The light came back on a couple of weeks later. Took it to shop again, to turn it off...it came back on again a couple of weeks later...Another repair guy did diganosis, 0430 and 0420 codes....said to try CataClean to flush out the system...tried a couple of bottles of this...engine light would still come back on a few weeks later. Suggested to replace both catalytic converter and a couple of the O2 sensors.
p0420/430 catalyst efficiency below threshold bank 1 and 2
Car runs beautiful and yet the stupid codes po420 & po430 keep popping up.
ON ANOTHER NOTE:
If your transmission is slipping, don't replace it! There's another flaw with with the 2001 2002 2003 Toyota RAV4 2WD Engine Computer ECM ECU PCM unit. The flaw unit caused my transmission to slip, making it appear my transmission was going out. I called the dealer, and they were clueless about the Toyota Rav4 having flaw ECM unit. (YEAH RIGHT)
I bought a refurbished unit on ebay for $135 with (stronger modified circuts) and put it in myself. It took 30 mins to take out and install the new one. No more transmission slippage! Car runs like brand new again!
local mechanic told me of toyota software update to fix false check engine light. verified by google search. reported to toyota which made good on fix. never received recall or other notice of problem from toyota
Check engine light on, dealer states it's the catalytic converter
Engine light with problem indicating Catalytic Converter....
My engine light came on, turned if off, then it come on again, turned if off, drove 50 miles, passed smog test, then the light came back on. Been on since after the test, almost been two years, need a smog test next summer.
Catalytic converter codes show up - engine check light always on...
check engine light on and codes catalytic converter when the car has no symptoms of any problem.
I had the check engine light come on during a long drive from the desert. I took the car into the dealer, who charged me $125 to hook it up to their diagnostic. Of course, they said I needed a new cat converter at a cost of over $2000. I told them to stuff it and took it to an independent service station that specializes in exhaust systems. The owner of the shop told me about this issue and fixed it for me and smogged my car. What a rip off the deal is.
Diagnosed po420, bank 1 and 2 failed .po430 bank 1 and 2 failed.
CHECK ENGINE LIGHT CAME ON AFTER TWO YEARS THIS IS MY 3RD CAT
If not updated light will come on about every 500 miles after being cleared