GM and Chevrolet OBD1 Trouble Codes (ALDL Fault Code List) >> GM 92-93 3.8L & 3.8L Supercharged

13

Oxygen Sensor Circuit

14

Coolant Temperature Sensor Circuit

15

Coolant Sensor Circuit

16

System Voltage High/Low

17

Spark Reference Circuit

18

Cam/Crank Error

21

Throttle Position Sensor (TPS) Signal Voltage High

22

Throttle Position Sensor Circuit (Signal Voltage Low)

23

Intake Air Temp (IAT) Sensor (Low Temp Indicated)

24

Vehicle Speed Sensor (VSS) Circuit

25

Intake Air Temp (IAT) Sensor (High Temp Indicated)

26

Quad Driver (QDM) “A” Fault

31

PRNDL Switch Circuit

34

Mass Air Flow Sensor (MAF) Circuit

36

Transaxle Shift Control Problem

38

TCC Brake Input Circuit

39

Torque Converter Clutch (TCC) Circuit

41

Cam Sensor Circuit

42

Electronic Spark Timing (EST) Circuit

43

Electronic Spark Control (ESC) Circuit

44

Oxygen Sensor (O2S) Circuit (Lean Indication)

45

Oxygen Sensor (O2S) Circuit (Rich Indication)

51

Mem-Cal Error (Faulty or Incorrect Mem-Cal)

54

Exhaust Gas Recirculation (EGR) Fault

56

Quad-Driver “B” (QDM) Fault

57

Boost Control Problem

58

Security System (Fuel Enable Circuit)

61

Cruise Vent Solenoid Circuit

62

Cruise Vacuum Solenoid Circuit

63

Cruise System Problem (SPS Indicated Low)

65

Cruise Servo Position Sensor

66

Low A/C Refrigerant Charge

67

Cruise Switches Circuit

68

Cruise System Problem

69

A/C Head Pressure Switch Circuit