Equus 3123 - GM Code Reader (1982 - 1995) - Manual (Page 20)

2
2-11 GM
CODE SERVICE CODE DEFINITION
56 Vacuum sensor circuit fault or quad driver "B" fault
(3.8L VIN1)
Corrosivity/add coolant
57 Boost control problem (3.8L VIN1)
58 Vehicle Anti-Theft System fault (3.8L)
Transmission Temperature Sensor (TTS) - short circuit
Transmission fluid temp high
59 Transmission Temp Sensor (TTS) - open
Transmission fluid temp low
60 Transmission not in drive
61 Oxygen sensor signal fault or port throttle system fault
or on-board cruise control fault (vent solenoid circuit)
Air Conditioner (A/C) system performance problems
62 Engine oil temperature sensor fault or gear switch
signal circuit fault or on-board cruise control fault
(vacuum solenoid circuit)
63 EGR flow problem or on-board cruise control problem
Servo Position Sensor (SPS) circuit fault or Manifold
Absolute Pressure (MAP) sensor fault or oxygen sensor
fault
64 EGR flow problem or on-board cruise control problem or
Manifold Absolute Pressure (MAP) sensor fault or
oxygen sensor fault
65 EGR flow problem or on-board cruise control problem
Servo Position Sensor (SPS) circuit fault or Manifold
Absolute Pressure (MAP) sensor fault or oxygen sensor
fault or fuel injector current low
66 Electronic Control Module (ECM) computer circuit fault
or air conditioning pressure sensor circuit fault or low
air conditioning refrigerant charge
(Transmission) 3-2 shift control solenoid - circuit
problems
67 Cruise control - switch circuit problems
Air Conditioner (A/C) pressure sensor - circuit problems
Torque Converter Clutch (TCC) solenoid - circuit
problems
Cruise control switches - circuit problems