got the P1133 code today. mods are CA V2 header, 3" ZZP dp with cat, 42#s, 3.1"

Been running that header for a couple months. Idle AFR has always been on the rich side, low 14:1 ish.

Do you guys think my primary o2 is shittin the bed?

 

anyone?

 

if that is the heated o2 sensor code then dont worry about it. It is a fairly common code. I had it and never experienced and problems. Was told it is because the sensor isnt heating up fast enough because the built in heater in the sensor is broken. needs to be at something like 600 deg F to work properly.

 

I am just curious as to what causes it.

either:
1. soemthing went haywire in the sensor itself.
OR
2. the placement in the c/a header is causing it not to cycle properly.

I cleared the code and it hasnt come back, yet. i'll just hope it stays that way