Isnt catalytic below threshold usually related to 02 sensors? Post what the actual code is on here and you might get some offering suggestions.
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Maybe start with the code you know you have first. A quick search on here says you need new 02 sensors and stick with only Denso, never Bosch. If it were me I would replace those and see if that takes care of it. Here's one:
www.tundrasolutions.com
If you replace the sensors and still have problems then read this one. Not saying you have the same issue as symptoms are different but the point is this guy had damaged wires due to mice so you might have a similar problem. And shorted wires can cause all kinds of weird issues.
www.tundrasolutions.com
P0420 P0430 error codes
Recently purchased used 2005 Tundra V8 4.7L. It has 100K miles and is getting P0420 and P0430 codes. The truck has been in NH its whole life. I've read the threads on these codes and learned a great deal. Here is what I know: 1. Previous owner said he recently replaced two back O2...
www.tundrasolutions.com
If you replace the sensors and still have problems then read this one. Not saying you have the same issue as symptoms are different but the point is this guy had damaged wires due to mice so you might have a similar problem. And shorted wires can cause all kinds of weird issues.
Need help! Unexplained powerloss
Hello all, Its been a couple month of intermittent power loss/bogging issues with my 2006 Tundra DC. Long story short it feels as if I'm towing a boat in the lower rpms, revs in the higher rpms. Also when going up hill all the sudden no power and struggles to climb. It will shift, but no power...
www.tundrasolutions.com
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