p0133 code

[dee99gt]

Today my car's engine light came on.. I read the code when I got home..

I have stock headers, o/r x and stock mufflers. I've had my car tuned with the brenspeed e-mail tune for the intake and o/r x about 3 or more months ago and haven't had any issues, but why all of a sudden is it giving me this code?

 

[06Rousher]

Change out the o2, or swap the o2's and see if it pops up on the other bank before you spend $40 on a new o2

 

[86GT351]

Passenger side Upstream O2 Sensor. Make sure you don't have AC water dripping on it. Can cause it to go bad!

 

[Sprayin Blue 3V]

This pops up on my car every once in a while (maybe 2-3 times in 2 years) and I just clear it and it goes away. Never noticed any real problems with it.

 

[dee99gt]

I decided to clear it last night and it was fine this morning. This afternoon I had to run errands and every time I would go to stop it would really bog down to 500rpms or lower and I thought was going to die. It was even worse when the A/C was running.

 

[TexasBlownV8]

That code is usually associated with long-tube headers where the front o2 sensors are moved farther away from the motor. With stock manifolds though, I also recommend swapping it with the sensor on the other side. If the code changes to the other bank, you know it's the sensor.
A bad sensor would cause drivability issues like you mentioned.

 

[coleconner]

I thought having an Xcal3 would eliminate any O2 Sensor errors unless they're malfunctioning. I think this code showed up one time after I changed my mid pipe to O/R. It's crazy how much effect those sensors can have on the motor.