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2000 Pontiac Firebird Question: What would cause these codes to pop up all at once?

 

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wareid585, 3.8L V6, Price, UT, January 07, 2013, 11:06
 Rookie

The codes are P0151, P0131, P0137, and P0300. I find it unlikely that 3 o2 sensors would go out all at once. I am looking in to replacing all the plugs and wires to see if that fixes the problems. Is there anything else that would be recommended?

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  • Answer #1

    Greg's Orange Auto (13401 Answers) , Orange, CA - (714) 361-9386
    globalhelper January 07, 2013, 12:55
     Master

    don't waste your money seek diag to get it right the first time. you may have a circuit issue

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    wareid585, January 07, 2013, 13:48
     Rookie

    I took the firebird in to a mechanic that i used to work for to see if he could narrow a few things down. He is thinking it is either the mass airflow sensor went out or it is just not getting fuel.

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  • Answer #2

    csubak30 January 07, 2013, 13:01
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     Master

    Other possibility is a fouled catalytic converter. This will back-up the exhaust flow, tripping o2 sensors. Need diagnostic on flow to determine issue.

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