SPONSORED LINKS

2002 Toyota Corolla catalyst efficiences below threshold

Tiny
MLSMC
  • MEMBER
  • 2002 TOYOTA COROLLA
Computer problem
2002 Toyota Corolla Automatic 157000 miles

I have this check engine code: catalyst efficiences below threshold
and I am told to put gas treatment in my tank and it may fix the problem. Is this good information?
SPONSORED LINKS
Tuesday, December 9th, 2008 AT 8:14 AM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
It is more than likely a bad O2 senor(s). Especially if they have never been changed.
Before changing them have a backpressure test performed on the CAT to see if it is clogged or partially clogged.
Was this
answer
helpful?
Yes
No
Tuesday, December 9th, 2008 AT 9:09 AM

Please login or register to post a reply.

Related Catalytic Converter Content

How to Test a Catalytic Converter?
VIDEO
How to Test a Catalytic Converter?
Instructional repair video
Catalytic Converter
GUIDE
Catalytic Converter
The engine exhaust system catalytic converter was developed in the early 1970's when severe air pollution was prevalent, and was made mandatory in automobile manufacturing...
VIEW MORE

Sponsored links