I had my Fuel Injectors cleaned and Fuel filter replaced, and on my way home my CEL turned off. Could this mean that I'm home free with out replacing my O2 sensor or my Knock Sensor? I had error codes for both.

 

How did you clean the injectors?

 

Finish the job and replace the O2 sensor, or you'll end up in a visous cycle.

 

took it to a mechanic and let him mess with it.

 

What did that run ya'?

 

MAXRPM-
How do you see it as a Vicious cycle? Just because a CEL comes on and points to an 02 sensor doesn't only mean that the sensor is bad. It also means that the sensor is reading values that are out of its parameters.

 

If I were you, I would simply run with it for a while. Aint' no sense in fixing what ain't broke. And, keeping a bad O2 sensor on your car's not gonna hurt anything else anyways.

DW