Somebody confirm please! The right side of the pic is the front - TopicsExpress



          

Somebody confirm please! The right side of the pic is the front of the car. The 02 sensor on the pic is supposed to be the FRONT 02 (5 wires). The REAR O2 sensor (not pictured) about 6 to the left of the cat (4 wires) . The o2s were originally flipped backwards for some reason. 5 wires in the rear and 4 wires in the front. Just want to confirm that they were in fact put in backwards. I keep getting the p0420 (cat system efficiency below theshold) I know the o2s work. What is causing the code? Do i need the o2 spacer? Before i flipped the o2s around i used to get the cel after about 100 miles. Now, after i flipped them it goes on after 25 miles. Please help.
Posted on: Fri, 26 Sep 2014 19:53:00 +0000

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