Cat

[pin8246]

This has prob been cover many many times, but im seeing to many different answeres and so many threads on it. Im throwing the P0420 code, and had it checked and its the actual cat is bad. Is there any aftermarket cat that actually works and doesnt throw codes. Seeing people say they dont, and listening to the dealer they dont. But I cant bring myself to spend 2 grand on a truck thats only worth about 4. Any help would be appreciated.

 

[Stick Figure]

a lot of that depends on year of vehicle and what emissions you have CA or 49 state.

 

[pin8246]

Sorry about that, just realized that. Its a 98 Limited V6, and its not Cali.

 

[pin8246]

No ones had any luck with aftermarket ones not throwing the code?

 

[iowajosh]

If your cat is intact, make sure both O2 sensors are denso. As I understand it, the 420 means the sensor isn't getting the reading it should. I can see why a shop would tell you the cat is bad. Big $$.

 

[Stick Figure]

Some people have had luck with aftermarket cats on the earlier trucks, but you would have to search around to see who has used what. I have a 2000 and is CA emissions so my personal research is geared mostly towards that.

 

[02-Sport]

a lot of that depends on year of vehicle and what emissions you have CA or 49 state.

Sorry I'm jumping in on your thread but I've been trying to figure this out too.

My 02 and my sons 01 is throwing same code. Both are CA emmissions, With them being CA and if I need cats do they make CA specific cats?

When I did car fax on both the 01 is from CA but the 02 was bought new in Kentucky??

 

[iowajosh]

I've got a $200 one in the mail so we shall eventually see. It will work one way or the other but my cat was gone and it makes the thing annoyingly loud. With no cat and the old O2 sensor there was no code. Got a new sensor hoping for MPG and pops the 420.

 

[FSRMaster]

ive been running a NAPA cat for about 4 months now with no codes thrown. the only problem is that aftermarket cats wont last as long as the stock cat

 

[PitbullRescuer]

Both are CA emmissions, With them being CA and if I need cats do they make CA specific cats?

When I did car fax on both the 01 is from CA but the 02 was bought new in Kentucky??

Don't know if they're CA specific cats but CA emissions vehicles have 2 cats.

They don't need to be CA vehicles either. My '99 was a PA vehicle it's whole life but was CA Emissions.

 

[pin8246]

Yea my sensors are all denzo, Ive did and changed everything possible to figure this out, and there was nothing left I could do thats why it went to the dealer for a look.

 

[Stick Figure]

Sorry I'm jumping in on your thread but I've been trying to figure this out too.

My 02 and my sons 01 is throwing same code. Both are CA emmissions, With them being CA and if I need cats do they make CA specific cats?

When I did car fax on both the 01 is from CA but the 02 was bought new in Kentucky??

If you are registering it in CA they have to be factory or on the CARB approved list for your specific year, make, model, engine. Out of CA, I won't be much help and you will have to consult your local laws.

 

[TheDurk]

Sorry I'm jumping in on your thread but I've been trying to figure this out too.

My 02 and my sons 01 is throwing same code. Both are CA emmissions, With them being CA and if I need cats do they make CA specific cats?

When I did car fax on both the 01 is from CA but the 02 was bought new in Kentucky??

The Cali. and Federal emissions specs were unified from 2001 on. So all 4Runners from those years have the more efficient two-cat system used in the Cali. 4Runners in 1999 and 2000. That said, not all parts made for Cali. two-cat systems can be used or sold in California as CARB requires their own testing approval for all replacement emissions parts. So you see cats for Cali. emissions trucks from '99-'00 or for '01-'02 trucks in general that are not for sale in California but are designed for those systems. I would guess that a CARB approved cat would be less likely to throw a code as it has passed more rigorous tests, but it's just a guess--I have no evidence.

 

[TheDurk]

Don't know if they're CA specific cats but CA emissions vehicles have 2 cats.

They don't need to be CA vehicles either. My '99 was a PA vehicle it's whole life but was CA Emissions.

Most of the Northeast states adopted the Cali. standards prior to the Federal rule doing so for 2001. So as of the date those states joined the program, all trucks sold in those states had to meet Cali. specs. As the law was set up, once a sufficient number of states had opted in in this way, the EPA would then require it for all 50 states-which took effect for the 2001 model year.