Equus 3123 - GM Code Reader (1982 - 1995) - Manual (Page 24)

2
2-15 GM
CODE SERVICE CODE DEFINITION
48 Hold mode voltage is too low
Reference input intermittent
49 Gear selector error signal
51 Powertrain Control Module (PCM) computer circuit
problem
52 Hold mode stuck "on"
Battery voltage out of range
53 Hold mode stuck "off"
ESC (Knock present)
54 Powertrain Control Module (PCM) computer circuit
problem
5-volt reference ground
55 Transaxle temperature sensor failure
56 Generic Field-Effect Transistor (FET) driver failure
57 Powertrain Control Module (PCM)
58 Battery voltage unstable
61 Possible open or intermittent in DIS module harness 6X
Signal fault
Powertrain Control Module (PCM)
62 Powertrain Control Module (PCM)
63 Powertrain Control Module (PCM)
Option check sum error (set if tire size and options do
not compare with those stored)
64 Powertrain Control Module (PCM)
65 Ignition voltage problem
66 Clamp shorted
67 Clamp open
Handwheel sensor circuit fault
68 Line circuit grounded or open
69 Line circuit shorted
71 2nd line circuit - grounded or open
Cooling system high temperature
72 2nd line circuit - shorted
Cooling system low temperature