1968 Shelby GT500

Two Digit Codes 75-99

# KOEO CM KOER Code Definition
75    
X
Brake On/Off switch failure always ON.
76    
X
Insufficient VAT change during Dynamic Response Test (user error).
77    
X
System failed to recognize brief WOT during Dynamic Response Test (user error).
79
X
    A/C or defrost on during self test.
80    
X
Cylinder #8 Failed Cylinder Balance Test.
81
X
    Air management 2 circuit failure (AM2/TAD).
 
X
  MAP sensor vacuum was not greater than 2 in-Hg (7 kPa) during normal vehicle operation.
82    
X
Air management 1 circuit failure (AM1/TAB) .
83
X
    EGR Control solenoid circuit failure.
X
    High speed electro-drive fan circuit failure.
X
X
  Low speed fuel pump relay circuit open.
84
X
 
X
EGR Vacuum Solenoid circuit failure.
85
X
 
X
Canister Purge Solenoid circuit failure.
86
X
    3 Ė 4 Shift solenoid circuit failure.
 
X
  Adaptive fuel limit reached.
87
X
    Fuel pump primary circuit failure. When the FP relay was activated by the EEC, voltage was not detected on the control circuit.
 
X
  Voltage was not detected on Fuel Pump Monitor while the engine was running.
88
X
    Electro-drive fan circuit failure.
 
X
  Loss of dual plug input control.
89  
X
  Converter clutch solenoid circuit failure.
90    
X
All cylinders passed Cylinder Balance Test.
91
X
    Shift solenoid 1 circuit failure (E4OD).
 
X
  No HEGO switching detected always lean (left side).
   
X
HEGO sensor circuit indicates system lean (left side).
92
X
    Shift solenoid 2 circuit failure (E4OD).
 
X
  No HEGO switching detected always rich (left side).
   
X
HEGO sensor circuit indicates system rich (left side).
93
X
    Coast clutch solenoid circuit failure (E4OD).
94
X
    Converter clutch solenoid circuit failure (E4OD).
   
X
Thermactor Air Injection system inoperative (left side).
95
X
X
  Fuel pump secondary circuit failure. The EEC senses infinite resistance to ground from the fuel pump on the Fuel Pump Monitor circuit.
96
X
X
  Fuel pump secondary circuit failure. The EEC did not sense battery voltage on the Fuel Pump Monitor circuit.
97
X
    Overdrive cancel indicator light circuit failure (E4OD).
98
X
X
  Electronic pressure control driver open in EEC (E4OD).
   
X
Hard fault present.
99
X
X
  Electronic pressure control circuit failure (E4OD).
   
X
EEC system hasnít learned to control idle.

KOEO = Key On Engine Off, CM = Continues Memory, KOER = Key On Engine Running

Codes 10-32
Codes 33-58
Codes 59-74
Three Digit Codes

 
 
 
 
 

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