I am trying to locate the 4 oxygen sensors in my 04 Verona. The check engine light it on and I'm told I need to replace them in order to pass the emission test. I can't afford the OEM parts and thinking about do the job myself, replacing them with universal OS. Where are they located in the car ? (two before the catalytic converter and two after)
Thanks for the link to those other post, very enlightening. I had the codes scanned at Auto Zone and they said I needed all four (probably lied to me). But I decided to order all four away online. I just need to know where they physically are located on the vehical. I intend on replacing them myself if no special tools are required.
I have been living with this problem for a several months. Intermitent at first, but solid for some time now. Yes, I did jump a car a while back but the light was already on. The engine is a 2.5L. I have not had any major work done on the motor. Yes I did buy a new battery 6-8 mos ago, I don't think the engine light was on at the time but can't be sure.
Rear view of engine showing the UPPER two sensors. Now, directly below and after the cat converter (but not pictured) are the 2nd set of sensors. Bank 1 & 2 number 2 sensors.
These next pics are of the wire lead CLIPS that you have to disengage from the wiring harness. The area is REAL tight to get to. I used a super small screw driver to break the bond. I went in from below the car to access it. On the clip pic...don't worry about those little SIDE retaining clips. They hold the end of the plug TOGETHER, but not to the mating harness plug half.
The must have tools...22mm sensor socket and flex head wrench.
Disengaging the CLIPS was the hardest part. Hope this helps.
I thought we were talking about a Verona?
The previous pics are excellent but for the GV/XL V6 engine not the straight inline 6 used on the Verona.
But to clarify the positions. Bank 1 is sensors are BEFORE the catalytic converter. Bank 2 is after the converters. So, Bank1 Sensor 1 is top sensor closest to the drive belts. B1S2 is closest to belts but downstream after the converter. Bank2 is of course the driver side sensors.
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