Am I right in thinking its normal for the engine light to come on after a decat has been fitted? on my blob fitted all the decats the other day and no lights came on but on a longer drive to day it came on and is staying but drives fine.

 

0420 typically

 

yer and heat sensor fault expect that as its not plugged in now guessing a remap would fix those problems

 

A re-map is a good idea after de-catting so the mapper should be able to turn those lights off at the same time.

 

Does that mean they will not come back on once mapped then

 

Yes.
But re-mapping after de-cat is vital. The ecu can't work out what is going on and you run the risk of over boost, running lean, premature detonation and engine death.

Apologies if I'm telling you how to suck eggs.

 

Thats ok waiting to have time to fit the new fuel pump and work out where to get it mapped in local area