My experience with P0430

06 PreRunner mileage:155k
My CEL came on the other morning. The code was P0430. You can find the whole definition in a search. Basically Bank 2 emissions issues. Checked for leaks and did not notice any. On a recommendation from the parts guy at a parts store I ran a bottle of seafoam. The next day the CEL was off. I was on my way to buy a temp gun to check the cats. This may not be a permanent solution but at least the light will not bother me. In the mean time I can run through checking the system out. Maybe an upgrade, who knows. Im open to suggestions.

 

if the a/f and o2 sensors are original, they are just wearing out

all a/f and 02 sensors have a finite life and most start to fail ~130,000 miles or so
(ymmv of course)

depends on a lot of factors, but 155k if those are original sensors, may as well
change them all out....or expect codes to pop up for the next 6 months

 

Your right. I have definitely exceeded the life on these components. Thanks you for the reply.

 

When i had that CEL code i had blown out cats. Granted i also had a bad head gasket, but that was only on the left bank and both cats were blown out... something to consider.

 

Interesting. Thanks Ranger.

 

hmm...my 4runner popped a/f at 135,000 and o2 at 146,000

replaced with OEM, now 220,000+ miles no issues
passes Ma emissions and runs fine. seems my cats are holding up

(funny story, it blew the P0420 code On April 20th!)

 

420

 

So i have UltraGauge it is showing me this P0430 code. But i do not have a check engine light.

Should i clear it not worry about it ?

I did my my 30k maintenance.
Changed the spark plugs with irridum plugs
New air filter
Cleaned the maf
Cleaned the intake throttle body.
Has a fairly new PCV valve which run into Oil can which has dirty filter.

It has a rough idle. The rpm when idle is between 700 to 800.

 

codes that don't light the mil are due to:

-your mil is busted

-pending codes.
you need X many codes firing at X intervals or for X driving pattern before a pending code moves to illuminate MIL