Have Toyota Questions? Ask a Mechanic for Answers ASAP
Hello and welcome to just answer, my name is ***** ***** master tech here to help. I cannot see or hear your vehicle so I rely on your patience and input to my questions so I can help you better. I read your notes and ready to assist you and will work hard to satisfy your questions for a 5 star ratting.
You said you replaced the muffler? But not the catalytic convertor and that is what is causing this. It either needs replacing or has been removed by the previous owner and the oxy sensors work in pairs one in front and one behind that convertor to monitor it's operation.The way we tell is to hook up our shop scanner and look at those oxy sensors operation. I will send you pics and info further info on this so you can better understand what is happening and if you need further advice just ask.
ok so do you understand how it operates and what needs to be done/