What is the meaning of your trouble shooting codes for a 1992 olds toronado trofeo?

Code 12: Oxygen sensor circuit malfunction

Code 13: Oxygen sensor heater circuit malfunction

Code 14: Fuel injector circuit malfunction

Code 15: Coolant temperature sensor circuit malfunction

Code 16: Intake air temperature sensor circuit malfunction

Code 17: Vehicle speed sensor circuit malfunction

Code 18: Throttle position sensor circuit malfunction

Code 19: Manifold absolute pressure sensor circuit malfunction

Code 20: Barometric pressure sensor circuit malfunction

Code 21: Knock sensor circuit malfunction

Code 22: EGR valve circuit malfunction

Code 23: EGR temperature sensor circuit malfunction

Code 24: EVAP system leak detection pump circuit malfunction

Code 25: EVAP system vent solenoid circuit malfunction

Code 26: EVAP system purge solenoid circuit malfunction

Code 27: Fuel tank pressure sensor circuit malfunction

Code 28: Fuel level sensor circuit malfunction

Code 29: Transmission fluid temperature sensor circuit malfunction

Code 30: Transmission fluid pressure sensor circuit malfunction

If you are experiencing any of these trouble codes, it is important to have your vehicle diagnosed by a qualified mechanic.