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PO421 & P1850

hxken Dec 9, 2015

  1. hxken

    hxken New Member

    Recently had a full de cat miltek fitted along with a stage 2 Revo map. Car has seemed to go into limp mode or similar 3 or 4 times since
    P1850 seems to come back as a auto box fault due to damp electrics. Is the control unit under the carpet ??
    PO421 warm up catalyst bank 1 efficiency below threshold upper limit reached ??
    Reset the po421 after managment light has come on
    Any help much appreciated the stage 2 map is supposed to work along with the decats.
    Maybe its coincidence or maybe I need a new lamba sensor ??????
    Has gone poorly again since but no dash lights

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