What are the only 2 kinds of sensors that are ABSOLUTELY REQUIRED to electronically control a fuel injected, spark-ignition engine?

Manifold Absolute Pressor Sensor (MAP) and O2 Sensor. One to measure the air quantity and the other is to measure Oxygen level in the exhaust

A coolant temperature sensor (usually supplied with the EMS) andAn air temperature sensor (usually supplied with the EMS)

1.Manifold Absolute Pressor Sensor (MAP) 

2.NOx sensor

The Flow sensor just before the inlet valve and the Pressure sensor which is attached to the Valve End area.

gas sensore and presure sensore

(1) Crank Shaft rotational Angular Position Sensor - i.e rotaty motion sensor

(2) Air Flow sensor in the intake manifold

Camshaft and Crankshaft sensors

cam shaft position sensor and air flow sensors

the piezoelectric sensor pawlthe oxygen probe

1)cam shaft sensor

2)cranck shaft sensor

crankshaft position sensor and camshaft position sensor