420 code

Hell, I am having an issue with this 420 code catalyst system efficiency below threshold (bank1)
I have replaced the catalytic converters both, new plugs, new fuel pump, bank one 02 sensor problem still there. After it rins a while 1-2 hrs if i turn it off it wont start for about 20-30-min then runs fine.any help would be great. Took it to a Toyota guy and he could not figure it out.

 

It has a drug problem. Marijuana is the main culprit considering the code is 420. Seek help.
Seriously though. The bank one sensor is a air/fuel sensor and the second sensor is a "flow" sensor. If the catalytic convertor becomes clogged or if the flow is too good, a code can be setoff. If you get a code for any banks, replace the sensors.

 

so replace the mass air flow sensor? and what other sensor?

 

O2 Sensors.

 

can that cause it to not start?

 

I am talking about the P420 code.

 

oh my, is this really about pulling a code... or pulling through?

 

https://www.tacomaworld.com/forums/new-members.19/

 

Ah yes, the code when the throttle body gets a little sticky icky

 

What do you mean? Any solution to this issue.