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2006 Acura RSX Question: Check engine light with code P0139

 

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RSXDM40, Pasadena, TX, May 20, 2012, 20:09
 Rookie

Would a secondary O2 sensor see a race header as a faulty cat?
My check engine light is on with a code P0139. I have checked the wiring, replaced the O2 sensor and put a non fouler/ check engine light eliminator in the secondary O2 bung.

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  • Answer #1

    Greg's Orange Auto (13005 Answers) , Orange, CA - (714) 361-9386
    globalhelper May 21, 2012, 07:14
     Master

    SHOULDN"T SEE IT LIKE THAT BUT YOUNEVER KNOW ON CARS. ARE YOU ABLE TO READ O2 ACTIVITY?

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    RSXDM40, May 22, 2012, 01:50
     Rookie

    I can read the secondary O2 sensor voltage and it stays around. 5 volts

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