I got the code 1133 the other day. I checked to see what it means;"Heated Oxygen Sensor (HO2S) insufficient switching Bank 1 sensor 1". Which O2 is this, the driver's or passenger's side? I also noticed that two of my collector gaskets have blown away, most likely from being at the track all day this weekend. So, I'm sure this is the issue, but I would also like to know what side is bank one. Thanks.

 

It's the pre-cat sensor on the driver's side.

 

That's what I thought. It sounds like the gasket on the driver's side is blown. So, I'll have to fix that.