I have a Jeep Wrangler Sahara 02 and currently clocking 215 g's in mileage. She still runs like a dream but latley the engine light is on and the read out is saying that it is the front 1 bank 1 o2 sensor. No my jeep is from cali and has 4 o2 sensors and i have had them all replace within the last year.
Now my current mechanic is saying that the right O2 sensors are not installed. Is there a difference between factory o2 sensor and ones from Napa or a reg mechanic. Specific's i mean. would a non factory O2 sensor not compute with the on board computer? Or is my mechanic trying to string me along?