• Sign Up! To view all forums and unlock additional cool features

    Welcome to the #1 Fiesta ST Forum and Fiesta ST community dedicated to Fiesta ST owners and enthusiasts. Register for an account, it's free and it's easy, so don't hesitate to join the Fiesta ST Forum today!


CEL light of P0420 to P0141

Messages
17
Likes
9
Location
Sparks, NV, USA
#1
So I recently got a CEL of P0420, so I ordered the J style defouler. However, I have having trouble installing it as the defouler hits the catted downpipe shield and maybe even the pipe. I can't get the defouler connected all the way. I did get it to stay in, just not all the way in and then put in the o2 sensor, but I believe I still need to tighten it more. Now my car is throwing the P0141 CEL. Anyone know what to do? Thanks!
 


TyphoonFiST

9000 Post Club
Premium Account
Messages
11,495
Likes
7,986
Location
Rich-fizzield
#2
Do you have a tuner? Where did you put the defouler in the upstream o2 or downstream o2?
 




Top