Had both of the o2 sensors changed on Monday, my mechanic was asking about another sensor near or around the exhaust but couldn't locate. Another code came up a P0153 which he said is related to this other sensor that he couldn't find. Is there another o2 sensor near the exhaust somewhere. Anyway the check engine light came back on again on Wednesday. The car is still sputtering when going up hill around 3rd gear, its an automatic 6 cyl. Anyone know what kind of problem I may have.
