Cleaning O2 sensors?
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Cleaning O2 sensors? in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; So while i fixed my exhaust leak, i decided to clean the upper o2 sensor on bank 2 (driver side) ...
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    956Caddy's Avatar
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    Cleaning O2 sensors?

    So while i fixed my exhaust leak, i decided to clean the upper o2 sensor on bank 2 (driver side) and after installing everything back together i still get the P0430 code.
    Now my question is if i cleaned the upper o2 and NOT the lower one, will the ecm think the cat is still not doing its job cause the top sensor is cleaner than the lower one? OR do ya'll think its the catalytic converter?

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    Aurora5000's Avatar
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    Re: Cleaning O2 sensors?

    Replace...

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    956Caddy's Avatar
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    Quote Originally Posted by Aurora5000 View Post
    Replace...
    Replace the cat?

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    ztollon's Avatar
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    That's a below threshold code so I'd say try cleaning the downstream 02s first. If that don't work replace them. Did u look at the cat when u fixed the leak? Where was the leak? Was it close to the downstream sensors?

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    956Caddy's Avatar
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    No the leak was above the upstream sensor and at the elbow where it curves right after the manifold gasket and cat meet

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    Re: Cleaning O2 sensors?

    Quote Originally Posted by Aurora5000 View Post
    Replace...
    o2 sensor..

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    AAIIIC's Avatar
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    Re: Cleaning O2 sensors?

    How do you clean an O2 sensor? If the sensor is bad, replace it.
    '05 Stealth Grey CTS-V, Hyper Silver Linea Corse Venetos w/Continental ExtremeContact DWs (summer), black Team Dynamics ProRace 1.2 wheels with 275/35-18 R-compounds (track), Hyperblack Rota Torques (winter), KW Variant3s, V2 front brakes, Hotchkis rear sway bar, EPS cam, TEA-ported 243 heads, FAST92 intake w/LS2 TB, JBA Camaro/G8 1-3/4" shorty headers w/JBA cat pipes, Corsa exhaust, UUC motor and tranny mounts, UUC shifter, MAPerformance trailing arms, Specter cradle bushings, etc...

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    956Caddy's Avatar
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    I wire brushed around the sensor then poked the holes and blew them out.

  10. #9
    mattfranz is offline Cadillac Owners Member
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    Re: Cleaning O2 sensors?

    No, no, no, no, no, no, no. Just replace them. They aren't exactly cheap for something that can just sit in the palm of your hand but they're important for the proper running of your car. They're pretty easy to do, I had trouble with sensor 2 on bank 2 but I put a ratchet on there with the correct O2 head and smacked it with pipe and it came right out.

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