Ok so I've had an O2 Cel for awhile now. O2 is barely 2 years old. The cell is from running rich at WOT. Once I get the car tuned properly, do you guys think it will clear or should I just replace it before? Or even perhaps install an O2 sim? It's just one code from the front bank

 

When my 00 ran rich and had a CEL it was the coils.

 

I think Knight_yyz fouled an O2 sensor from running rich at WOT for like 8 months.

 

if its a secondary just sim it. its cheaper and its not gonna affect anything