PO421 & P1850


Registered User
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