GM OBD/OBD2 Codes >> 94-95 GM 6.5L Diesel

13

Engine ShutOff Solenoid Circuit Fault

14

Engine Coolant Temp (ECT) Sensor Circuit (High Temp)

15

Engine Coolant Temp (ECT) Sensor Circuit (Low Temp)

16

Vehicle Speed Sensor Buffer Fault

17

High Resolution Circuit Fault

18

Pump Cam Reference Pulse Error

19

Crankshaft Position Reference Error

21

Accelerator Pedal Position (APP) 1 Circuit High

22

Accelerator Pedal Position (APP) 1 Circuit Low

23

Accelerator Pedal Position (APP) 1 Circuit Range Fault

24

Vehicle Speed Sensor (VSS) CKT Low (Trans Output Speed)

25

Accelerator Pedal Position (APP) 2 Circuit High

26

Accelerator Pedal Position (APP) 2 Circuit Low

27

Accelerator Pedal Position (APP) 2 Circuit Range Fault

28

Transmission Range (TR) Pressure Switch Assembly Fault

29

Glow Plug Relay Circuit Fault

31

EGR Control Pressure/BARO Sensor Circuit Low (High VAC)

32

Exhaust Gas Recirculation (EGR) Circuit

33

EGR Control Pressure/BARO Sensor Circuit High (Low Vac)

34

Injection Timing Stepper (ITS) Motor Circuit Fault

35

Injection Pulse Width Error (Response Time Short)

36

Injection Pulse Width Error (Response Time Long)

37

Brake Switch Stuck On

38

Brake Switch Stuck Off

39

TCC Stuck Off

41

Brake Switch Circuit Fault

42

Fuel Temp Circuit Low (High Temp Indicated)

43

Fuel Temp Circuit High (Low Temp Indicated)

44

EGR Pulse Width Error

45

EGR Vent Error

46

MIL “Service Engine Soon” Circuit Fault

47

Intake Air Temperature (IAT) Circuit Low (High Temp)

48

Intake Air Temperature (IAT) Circuit High (Low Temp)

49

“Service Throttle Soon” Lamp Circuit Fault

51

PROM Error (Faulty or Incorrect PROM)

52

System Voltage High Long

53

System Voltage High

56

Injection Pump Calibration Resistor Error

57

PCM 5 Volt Shorted

58

Transmission Fluid Temperature Sensor Low (High Temp)

59

Transmission Fluid Temperature Sensor High (Low Temp)

61

Turbo Boost Sensor Circuit High

62

Turbo Boost Sensor Circuit Low

63

Accelerator Pedal Position (APP) 3 Circuit High

64

Accelerator Pedal Position (APP) 3 Circuit Low

65

Accelerator Pedal Position (APP) 3 Circuit Range Fault

66

3-2 Control Solenoid Circuit Fault

67

Torque Converter Clutch (TCC) Solenoid Circuit Fault

68

Trans Component Slipping

69

Torque Converter Clutch (TCC) Solenoid Stuck On

71

Set/Coast Switch Fault

72

Vehicle Speed Sensor Circuit Loss (Trans Output Speed)

73

Pressure Control Solenoid (PCS) Circuit (Current Error)

74

Transmission Input Speed (TIS) Sensor Circuit

75

System Voltage Low

76

Resume/Accel Switch Fault

78

Wastegate Solenoid Fault

79

Transmission Fluid Over Temperature

81

2-3 Shift Solenoid Circuit Fault

82

1-2 Shift Solenoid Circuit Fault

83

TCC PWM Solenoid Circuit (Automatic Transmission)

84

Accelerator Pedal Position (APP) Circuit Fault

85

Undefined Ratio Error

86

Low Ratio Error

87

High Ratio Error

88

TDC Offset Error

91

Cylinder Balance Fault

92

Cylinder Balance Fault

93

Cylinder Balance Fault

94

Cylinder Balance Fault

95

Cylinder Balance Fault

96

Cylinder Balance Fault

97

Cylinder Balance Fault

98

Cylinder Balance Fault

99

Accel Pedal Position (APP) 2.5 Volt Reference Fault