94-95 OBD I LT1 DTCs 
DTC 11 - Malfunction Indicator Lamp (MIL) Circuit 
DTC 13 - Bank I (Left) Heated Oxygen Sensor (HO2S) Circuit (Open Circuit) 
DTC 14 - Engine Coolant Temperature (ECT) Sensor Circuit ( Voltage Low, High Temp) 
DTC 15 - Engine Coolant Temperature (ECT) Sensor Circuit ( Voltage High, Low Temp)
DTC 16 - Distributor Ignition System (Low Resolution Pulse) 
DTC 18 - Injector Circuit(s) 
DTC 21 - Throttle Position (TP) Sensor Circuit (Signal Voltage High) 
DTC 22 - Throttle Position (TP) Sensor Circuit (Signal Voltage Low) 
DTC 23 - Intake Air Temperature (IAT) Sensor Circuit ( Voltage High, Low Temp) 
DTC 24 - Vehicle Speed Sensor (VSS) Circuit
DTC 25 - Intake Air Temperature (IAT) Sensor Circuit ( Voltage Low, High Temp) 
DTC 26 - Evaporative Emission (EVAP) Canister Purge Solenoid Valve Circuit 
DTC 27 - Exhaust Gas Recirculation (EGR) Vacuum Control Signal Solenoid Valve Circuit 
DTC 28 - Transmission Range (TR) Pressure Switch Assembly Fault 
DTC 29 - Secondary Air Injection (AIR) Pump Circuit 
DTC 32 - Exhaust Gas Recirculation (EGR) 
DTC 33 - Manifold Absolute Pressure (MAP) Sensor Circuit ( Voltage High - Low Vacuum) 
DTC 34 - Manifold Absolute Pressure (MAP) Sensor Circuit ( Voltage Low - High Vacuum) 
DTC 36 - Distributor Ignition System (Faulty High Res. or Extra Low Res. Pulse Detected)
DTC 37 - Brake Switch Stuck "ON
DTC 38 - Brake Switch Stuck "OFF 
DTC 41 - Ignition Control (IC) Circuit (Open Circuit)
DTC 42 - Ignition Control (IC) Circuit (Shorted or Grounded Circuit)
DTC 43 - Knock Sensor (KS) Circuit 
DTC 44 - Bank 1 (Left) Heated Oxygen Sensor (HO2S) Circuit (Lean Exhaust Indicated) 
DTC 45 - Bank 1 (Left) Heated Oxygen.Sensor (HO2S) Circuit (Rich Exhaust Indicated)
DTC 46 - PASS-Key Circuit 
DTC 47 - Knock Sensor (KS) Circuit or Module Missing 
DTC 48 - Mass Air Flow (MAF) Sensor Circuit 
DTC 50 - System Voltage Low 
DTC 51 - EEPROM Programming Error 
DTC 53 - System Voltage High
DTC 55 - Fuel Lean Monitor 
DTC 58 - Transmission Fluid Temperature (TFT) Sensor Circuit Low (High Temp )
DTC 59 - Transmission Fluid Temperature (Low Temperature Indicated) 
DTC 61 - A/C System Performance 
DTC 63 - Bank 2 (Right) Heated Oxygen Sensor (HO2S) Circuit (Open Circuit) 
DTC 64 - Bank 2 (Right) Heated Oxygen Sensor (HO2S) Circuit (Lean Exhaust Indicated) 
DTC 65 - Bank 2 (Right) Heated Oxygen Sensor (HO2S) Circuit (Rich Exhaust Indicated)
DTC 66 - A/C Refrigerant Pressure Sensor Circuit (Open or Shorted) 
DTC 67 - A/C Refrigerant Pressure Sensor Circuit (Pressure Sensor Activity) 
DTC 68 - A/C Relay Circuit (Shorted Circuit)
DTC 69 - A/C Clutch Circuit 
DTC 70 - A/C Clutch Relay Driver Circuit 
DTC 71 - A/C Evaporator Temperature Sensor Circuit 
DTC 72 - Vehicle Speed Sensor Loss 
DTC 73 - Pressure Control Solenoid (PCS) Circuit (Current Error) 
DTC 74 - Traction Control System(TCS)CircuitLow 
DTC 75 - Transmission System Voltage Low 
DTC 77 - Cooling Fan Relay Control Circuit
DTC 78 - Fan control PCM terminal A10 
DTC 79 - Transmission Fluid Overtemp
DTC 80 - Transmission Component slipping 
DTC 81 - Transmission 2- 3 Shift Solenoid Circuit 
DTC 82 - Transmission 1-2 Shift Solenoid Circuit 
DTC 83 - Reverse Inhibit System (Manual Transmission) <<<<<<<<<select>>>>>>
DTC 83 - TCC/PWM (Auto Trans)
DTC 84 - Automatic Transmission 3-2 Control Solenoid Circuit <<<select>>>>>> 
DTC 84 - Skip Shift Solenoid Circuit (Manual Transmission Only) 
DTC 85 - Transmission TCC Stuck "ON 
DTC 90 - Transmission TCC Solenoid Circuit 
DTC 91 - Skip Shift Lamp Circuit 
DTC 97 - VSS Output Circuit
DTC 99 - Tach Output Circuit