My CEL light came on again. This time the codes are 172,173,176,182 which all have to do with the oxegen sensors and rich or lean cylinders. In addition, I ran the KOER cylinder balance test, and found 4 out of 6 cylinders are reporting injector problems. My thinking is the whole problem may be injector related. Does injector cleaning fluid in the gas help this? Or do I need to take out the injectors and somehow clean them?

Howard
V6 1995 113K miles