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    bcaban's Avatar
    bcaban Posts: 9, Reputation: 1
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    #1

    Sep 28, 2007, 06:44 AM
    All oxygen sensors are bad
    My check engine light is on and I got my catalytic converter replaced and that wasn't the problem. I used a scanner to determine what codes I would get and it's reading Bank 1 and Bank 2. It's not specifying which sensors. I know one of the codes is PO430. Does this mean that all four of my sensors are bad when it doesn't specify any individual sensor.

    Please help
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #2

    Sep 28, 2007, 06:49 AM
    Quote Originally Posted by bcaban
    My check engine light is on and I got my catalytic converter replaced and that wasn't the problem. I used a scanner to determine what codes I would get and it's reading Bank 1 and Bank 2. It's not specifying which sensors. I know one of the codes is PO430. Does this mean that all four of my sensors are bad when it doesn't specify any individual sensor.?

    Please help
    What year, make and model and what engine option?
    I have resources I'd like to check...
    Rarely do all sensors fail simultaneously.
    bcaban's Avatar
    bcaban Posts: 9, Reputation: 1
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    #3

    Sep 28, 2007, 06:56 AM
    I have a 2001 Nissan Sentra 1.8l
    Mileage 150k
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #4

    Sep 28, 2007, 07:03 AM
    I will look at the diag charts for the P0430, but you said, "One of the codes..." Are there others as well? If so what are they? And were all the codes cleared after the cat was replaced?
    bcaban's Avatar
    bcaban Posts: 9, Reputation: 1
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    #5

    Sep 28, 2007, 07:13 AM
    The codes were cleared after the new cat was installed. The 2 codes that were displayed were PO430 and PO420.
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #6

    Sep 28, 2007, 07:31 AM
    Both of those code speak to catalyst efficiency. I don't have access to dealer diag charts on that car, but what I've read since your OP is that further hands on diag will be the best. Who is doing your repairs?
    bcaban's Avatar
    bcaban Posts: 9, Reputation: 1
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    #7

    Sep 28, 2007, 07:44 AM
    A friend of mine that is an mechanic will be doing the repair. Is there something else that I can purchase that will help me to diagnose which sensor it is?
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