My blazer has started leaking oil from front of the oil pan and I put some lucas oil stabilizer in it yesterday to try and help the leak. It helped but didnt fix it completely so I put more in this evening. About an hr later I got code P1134. I looked it up and it says something Heated Oxigen Sensor HO2S Transition Time Ratio Sensor 1 Bank 1. Does anyone have any clue what this means. From what I can tell it sounds like the O2 sensor is overheating.

 

This code does not mean that the sensor is overheating.

Have a read through this thread:
P1134 - HO2S Transition Time Ratio Bank 1 Sensor 1