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PRT/03 is a map sensor only, no air temp 
Most punto's have the PRT/05 which is a combined air and map.
Maybe why you have an air temp failure.
For info mmcompsys has a few Magnetti Marelli pdf's and you can find them floating around on the net as well.
Unsure about the stepper at the moment.....will have to put my thinking hat on
Most punto's have the PRT/05 which is a combined air and map.
Maybe why you have an air temp failure.
For info mmcompsys has a few Magnetti Marelli pdf's and you can find them floating around on the net as well.
Unsure about the stepper at the moment.....will have to put my thinking hat on