1991 buick obd 1 codes 34 41 42 need to know what the codes mean

Oxygen sensor circuit open or no activity DTC - 13 Left bank O2 sensor circuit open or no activity DTC - 14 Engine coolant temp sensor error (high temp indicated) DTC - 15 Engine coolant temp sensor error (low temp indicated) DTC - 16 System voltage too low DTC - 17 Camshaft position sensor error DTC - 21 Throttle Position sensor error (signal high) DTC - 22 Throttle position sensor error (signal low) DTC - 23 Intake air temp sensor error (low temp indicated) DTC - 24 Vehicle speed sensor error (open circuit or no activity) DTC - 25 Intake air temp sensor error (high temp indicated) DTC - 26 Quad Driver Module (QDM A) error DTC - 28 Auto transmission range pressure switch error DTC - 31 Wastegate solenoid circuit error DTC - 31 Gear Position Switch (PRNDL) error DTC - 32 EGR system failure DTC - 33 MAP sensor circuit error (signal high indicating low vacuum) DTC - 34 MAP sensor circuit error (signal low indicating high vacuum) DTC - 35 IAC problem or idle error DTC - 36 MAF sensor error DTC - 36 24x Crankshaft position sensor circuit error DTC - 36 4T60-E Shifting Error DTC - 37 TCC brake switch circuit error DTC - 38 TCC brake switch circuit error DTC - 39 Clutch switch circuit error DTC - 39 TCC error DTC - 41 Ignition control error DTC - 41 MEM-CAL error DTC - 41 C³I Cam Sensor Signal error DTC - 42 Ignition bypass circuit error DTC - 43 Knock sensor error DTC - 44 Oxygen sensor error (lean condition indicated) DTC - 44 Left bank O2 sensor error (lean condition indicated) DTC - 45 Oxygen sensor error (rich condition indicated) DTC - 45 Left bank O2 sensor error (rich condition indicated) DTC - 46 Pass-Key II (VATS) system error - circuit out of freq range DTC - 47 UART (serial data) circuit error DTC - 51 PROM error DTC - 51 Incorrect MEM-CAL DTC - 52 Fuel cal-pak incorrect or missing DTC - 53 System voltage too high DTC - 53 Digital EGR Valve solenoid 1 error DTC - 54 Fuel pump circuit low voltage DTC - 54 Digital EGR Valve solenoid 2 error DTC - 55 ECM error DTC - 55 Digital EGR Valve solenoid 3 error DTC - 56 Quad Driver Module (QDM B) error DTC - 57 Boost Control error DTC - 58 Trans fluid temp sensor circuit error (low voltage) DTC - 58 VATS system error DTC - 59 Trans fluid temp sensor circuit error (high voltage) DTC - 61 A/C system performance DTC - 63 Right bank O2 sensor circuit error DTC - 63 MAP sensor circuit signal voltage high (low vacuum indicated) DTC - 64 Right bank O2 sensor lean exhaust indicated DTC - 64 MAP sensor circuit signal voltage low (high vacuum indicated) DTC - 65 Right bank O2 sensor rich exhaust indicated DTC - 66 A/C pressure sensor circuit error (low pressure indicated) DTC - 67 A/C pressure sensor circuit error DTC - 68 A/C clutch relay circuit error (shorted to ground) DTC - 69 A/C clutch relay circuit error (open circuit indicated) DTC - 69 A/C high pressure switch error