replaced the inlet manifold gasket and now the car will not start .

i missed unplugging the blue sensor(what is it called & what does it do?) on the back of the block and the wires pulled from the plug

refitted them but not sure if i got them the right way around. will this stop the enging from starting?

thanks in advance
matt

 

Blue sensor is the coolant temp one.

 

Depending on how it was mapped, it could well stop the engine from starting

 

mine will not start with it unpluged

 

all sorted. swaped the wires over