Originally Posted by
Bez300
If you was to remove relay, the pump would not run, as I am sure you are aware, this will show a Fault code, but the engine will run fine, Your cats will not get the pre heat from the pump,
So in short, Yes, CEL light will be on all the time,
by the sounds of it, its on anyway,
If your ECU shows any serious faults engine will go into limp mode anyway.
Bez
Thanks Bez. I can at least plug the car into Delta Dash daily to be sure there is nothing else that is an issue. I just want to avoid the pump burning out until the mapping basically