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    Re: Vauxhall Zafria X reg, 1800 petrol, engine code Z18XE Archived Message

    Posted by Leslie Strong on March 27, 2007, 8:18 pm, in reply to "Vauxhall Zafria X reg, 1800 petrol, engine code Z18XE"

    Hi Dave
    As the fault code suggests switching of the 0 sensor is a problem and the heated circuit does not come up as a problem. The freeze frame data logs fuel trim short term minus 2.3%, long term 0%. Was operating in closed loop at the time of fault. Scanner code 2 desciptions for the same code, signal/switch time error and 02 sensor bank 1 no activity detected both for P1130. To try and cut a long story short vehicle back in last Friday opted to change airflow meter and oxygen sensor and this is the strange bit we got rid of code P1130 and got a new one OBD code P0170 mixture rich, changing components back to original and clearing would not get rid of new code - came straight back. Noting that although code would clear after a couple of minutes running oxygen sensor activity would slow at idle to 20 mv a couple of minutes later engine would kick light would come on and the engine would hunt slightly. Now extremely puzzled.
    P.S The Z18XE engine does not appear to have EGR especially as Vauxhalls dont list an EGR valve for it. For the original fault this is what I would have gone for.

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