Originally posted by akrump47:
I had this EXCACT same thing happen to me back in January. Check engine light came on, took it to Autozone and got code P0420 - Bank 1 catalyst running below efficiency. Bank 1 is between the engine and the firewall and tends to fail first because of all the heat.

Take it to the dealership and have them fix it. Ford is obligated to replace the cats if they fail before 80,000 by the federal emissions warranty. You shouldn't have to pay a dime.

Oh - HTH isn't my name, that stands for "Hope This Helps"

- Austin



Okay; Here's The Latest.

I went back to AutoZone a few days ago - just haven't had time to write. Just like you noted above, my code was P0420 - Bank 1 Cat running below efficiency. The "Pro" at this AutoZone said Bank-1 is NOT the Cat, that it is 1 of 2 or both Bank-1 sensors, located on the front and rear exhaust before the Cat. There's a good chance what you said about the heat damaging one sensor before the other is the case. >>>BUT<<< I'm going to perform an "If All Else Fails" repair and replace both Bank-1 sensors with Bosch Sensors next week. I'm aware it's going to cost me about $200.00 for the two sensors, but it's something I shouldn't have to worry about again for another 73,000 miles.

Do you agree???

Thomas

I Live My Life A Quarter Mile At A Time... During That 10 Seconds Or Less, I'm Free! 1998.5 SVT Contour aka: THE TOURMINATOR