Got code 12 exhaust gas recirculation temperature sensor. Or Absolute pressure valves from ELZ ignition control unit
Those 2 descriptions are from 2 different code lists.
I cleaned my egr and cleaned the tube. It was clogged but sprayed lot of carb cleaner and air in there and finally the air went into the intake. took for a test drive still got the light but it took longer to turn on.
Were is this sensor
pls help I need to smog the car.

Its a 91 300te 4 matic ca edition with blinker for code reader 3.0 engine