Hi

This car runs rough occaisionaly, it has had a lot of people looking at it in the past so I am unsure of what I have taken on!

The ECU has been replacred with a 728 ECU because the keys were lost, I have since put the original ECU back on and realigned the EWS. Since then the car runs better, but runs rough every now and again. It has had a replacement AFM and O2 sensors. The O2 sensors show a fixed reading of 4.71v and 4.83v and the DTCs are 203 'O2 sensor limit cyl 4-6' 202 'O2 sensor limit cyl 1-3'

The O2 sensors have Yellow,White,Red and Black wires, could they be the wrong O2 sensors? I know they use Seimans and Bosch but I am not sure which ones this car should use.

Sorry for the long post

Simon