Check Engine Light ON + Cat System?

2020 Tacoma 132,444 miles. Toyota Service Center did a diagnostic on my truck and it coded the Catalyst System Efficiency Below Threshold Bank 1 and Bank 2. Since there is an upstream and a downstream all four need to be changed for $6802.56. Any thoughts on this information? Thanks in advance

 

Who is "They"?

 

Toyota Service Center I just edited my original post

 

I know CATs can be expensive but $6800 sounds pretty high.
I've never had to replace mine so i can't compare costs but it might be worth getting a second opinion from a reputable independent shop in your area if possible?
I'm sure others here who have experience with this will chime in with better advice.

 

Its possible they are worn, but I've seen exhaust leaks from the down pipe cause this. Has it ever had any major work done to it?

Secondly, don't return to that shop. The upsteam primary catalytic converters are monitored for failure, the down stream secondary cats are not.

They are giving you a f-off quote because they arent sure of their diagnostics.

I've never called secondary cats for P0420 or P0430, the shop is incompetent.



They should have only quoted the cats that look like #1 in this picture.

 

I finally got the codes from the Service Advisor: P0420, P0430, B15FE, P043000, C1241, C1AC2, B15AD, C1AC1

 

I really appreciate all the assistance and replies. The price of $6800.00 just rolls off Service Advisor's tongue like everyone has that kind of money. I'm retired and my truck is running great except for the check engine light that came on. It accelerates and is not sluggish. I just came back from a road trip without any mechanical problems except for the check engine light so yes I am shaking my head over this.

 

If your cats are bad, only the front integrated manifold ones are monitored.

The rears after the o2 sensors aren’t monitored.

They are less than 2k for both with new hardware and gaskets. I replaced mine in my driveway, 2-3 hour job to do both.

 

If you clear the check engine does it come back on. Either way if it were me i would forget about it and just drive it.
Or take it to an independent muffler shop.

 

An update: I have my truck back from Toyota Service Center. We had to pay for their diagnostic check and just let them know we aren't accepting their service for $6800. The check engine light was still on when I picked up the truck from Toyota but less than 30 miles down the road and the engine light went out?? I did purchase some Catalytic cleaner but haven't put it in the gas tank yet.

 

Might wait and see if light ever comes back on, if not would hold off on gas additive. IMO

 

Check engine light is still OFF after 150 miles from picking truck up from Toyota service center. I haven't put any Catalytic cleaner in my truck yet. Has anyone ever used this brand?

 

As long as it drives fine and you don't have to deal with emissions testing where you live, just drive that mother fucker into the ground!!!

 

I have used it with great success on lot of cars we have sold over the years. Put it in as it can't hurt.

 

I would drive it awhile and see if the CEL comes back on. Doing too many things at once will make it hard to determine what fixed it if it clears up.