Quite a few codes. Help please
Anyhow here are the codes. Id like to replace the O2 if it needs replacing asap because I finally found a tuner under $300 and Im getting it tuned Monday morning.
P0133 - Slow response bank 1 sensor 1
P1153 - insufficient switching (most likely not enough oxygen to the sensor)
P0300 - misfire detected (could this be due to an improper A/F ratio? Im rich as HELL)
P0332 - Knock sensor ( Could this also be because my A/F ratio is screwed?)
I got rid of the EGR and I never got it deleted or tuned since...
I guess what Im really asking is how do I know if I need a new O2 sensor and will an A/F tune and deleting the EGR in the computer make my vehicle run correctly again?





