Catalyst System Efficiency Below Threshold Bank 1 and 2

My check engine light came on and I had the codes diagnosed at Autozone (Catalyst System Efficiency Below Threshold Bank 1 and 2). Any ideas on what could be causing this. The light came on once and I
disconnected the battery and shut the light off but it came back on in about 20 miles of driving. Would it be unusual for both converters to fail within 20-40 miles of each other. Thanks for any advice.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Possibly the oxygen sensor.
Cheers,
Dale

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
snipped-for-privacy@yahoo.com (Rich) wrote in message

I should mention that this is a 1997 Ford Taurus with 68,000 miles.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Rich wrote:

I had this problem with my 1996 Tbird 4.6 at ~120k miles (now at 145k). Mine didn't both start acting up at once though. When #2 started acting up, I just kept clearing it and it was ok for about 10k-15k the first time. The milage between problems decreased until I was resetting it every day. I then started noticing that #1 was acting up. I took it in to the dealer and they said it needed a new head pipe assembly (contains a preconverter for each side of the engine and the main converter)- and they could get it done for about $1600.00 - well, needless to say, I jumped right on that- NOT. I had a cheap (not steel- a less durable metal - aluminum perhaps) one put on at Midas for about $950. Note: in these figures only $150-$200 is labor, the rest is for the part.
My car sounds like crap now- you can definitely hear the difference in the exhaust system- but at least it will pass inspection and it runs without check engine lights or the 02 sensors killing the engine.
Moral of the story - check everything else before you look at a new cat- they're expensive, and at least in my case, the car is not the same afterword.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
New Cat :-( I was afraid of that...... I guess I'd better find a guy to "make" mine pass emmisons
Brian Steele wrote:

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

===========================I think that car only has 1 cat and one sensor monitoring it. So it most likely needs the 1 cat to fix it. Jusy FYI, it wont hurt a thing to drive it other than our air. :)
--
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com ).
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.