96 Deville Emissions codes. Need to pass Calif smog test.
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 96 Deville Emissions codes. Need to pass Calif smog test. in Past Cadillac Vehicle Discussion; Hello everyone. Im new to the site but not new to Cadillac s. I have a 1996 Deville, 4.6 liter ...
  1. #1
    ralphieboy57 is offline Cadillac Owners Member
    Automobile(s): 1996 DeVille
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    Dec 2011
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    96 Deville Emissions codes. Need to pass Calif smog test.

    Hello everyone. Im new to the site but not new to Cadillac s. I have a 1996 Deville, 4.6 liter that I got for a real good price. I need to do the DMV thing and get it smog checked. But its throwing a (P0300 code random missfire), (P0159 HO2S Slow Response Bank 2 Sensor 2), (P1139 HO2S Insuff. Switching Bank 1 Sensor 2), (P1406 EGR Valve Pintle Position Circuit). I have put new plugs and plug wires, fuel filter, air cleaner on this car and I want your opinion on what else I should do. The car starts up good when its cold but after warm up its hard to start and idles between 650 and 750 rpm. Im ready to replace the one oxygen sensor and clean out the EGR valve and throttle body. What else can I do to ensure a passing smog check?

    Thanks for your help...................Ralphieboy.

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    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
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    Re: 96 Deville Emissions codes. Need to pass Calif smog test.



    I think you have it covered, but you may need to replace 2 O2 sensors.

    B2S2 - Left bank manifold
    B1S2 - Pre-CAT sensor

    EDIT:
    There is no B2S2. Left bank manifold is B2S1. Not sure how you could have gotten that code.
    Sorry for the misinformation.

  4. #3
    ralphieboy57 is offline Cadillac Owners Member
    Automobile(s): 1996 DeVille
    Join Date
    Dec 2011
    Location
    Fountain Valley, Ca
    Posts
    17

    Re: 96 Deville Emissions codes. Need to pass Calif smog test.

    Yeah, I think your right. I'm going to replace two of them. I will let you know the outcome. Thankyou.

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