August 21, 20169 yr Hi ALL! I have a 2005 Subee Legacy Wgn. It has thrown the p0420 insufficient bank 1 catalyst code. YES, my car is a California emissions car!! I did the Catcleaner, didn't do anything. So decided to replace the LAST 02 sensor of the 5 that are in my car ! The dealer of course wants 130, I was told that the OEN 02 sensors are DENSO. So I went to RockAuto and bought a DENSO 02 sensor, it was described as California emissions, down stream and after the primary catalyst. I just came back from my buddies who installed it, now I'm just wondering if it IS the correct one ! The one that came out was a 4 prong connector, so is the one that went in. I THINK the part # for the one that came out was 2269-AA450, hard to tell, I do have a pic here ! The new DENSO # 234-4446. HELP ! THANKS ! SubeeTed
August 21, 20169 yr Assuming it has the OE style plug, If it plugged in its the correct sensor. All the o2 sensors have different key notches on the plugs. So the wrong senaor can't be installed and plugged in in an incorrect place.
August 21, 20169 yr Author THANKS so much for that info ! I didn't know about the keying situation ! Yes it's in and the car is running! We cleared the code.......now to see if it will fix the problem ! THANKS again ! SubeeTed
August 21, 20169 yr I've had that same P0420 code twice on my 2002 Forester. I just clear it, and it goes away.
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