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2003 Nissan Altima Question: what are this code?

 

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F2ABULLET, Pompano Beach, FL, August 23, 2012, 15:33
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Hello all, I have two code on my car and I need to know how address the problem.
P1574 Automatic speed control device speed sensor
P0420 Catalyst sistem efficienci below threshold bank 1

Al

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    pushrod August 23, 2012, 15:44
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     Master

    Is speedometer working? Need downstream 02 sensor readings eng. warm.
    @ 2000 rpm.

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  • Answer #2

    Greg's Orange Auto (12205 Answers) , Orange, CA - (714) 361-9386
    globalhelper August 24, 2012, 05:48
     Master

    you need help with these it code be several issues for either code

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