1968 Shelby GT500

Two Digit Codes 33-58

# KOEO CM KOER Code Definition
33  
X
X
EGR valve opening not detected.
34
X
 
X
PFE or EVP circuit above the closed limit of 0.67 volts.
 
X
  PFE or EVP circuit has intermittently failed above the closed limit of 0.67 volts.
35
X
 
X
PFE or EVP circuit above the maximum limit of 4.81 volts.
 
X
  PFE or EVP circuit has intermittently failed above the maximum limit of 4.81 volts.
39  
X
  AXOD converter bypass clutch not applying properly.
40    
X
Cylinder #4 Failed Cylinder Balance Test.
41  
X
  HEGO sensor circuit indicates system lean (right side).
   
X
No HEGO switching detected always lean (right side).
42  
X
  HEGO sensor circuit indicates system rich (right side).
   
X
No HEGO switching detected always rich (right side).
43  
X
  HEGO lean at Full Throttle.
44  
X
X
Thermactor Air Injection system inoperative (Right side).
45  
X
  DIS coil pack 3 circuit failure or coil 1 primary circuit failure.
   
X
Thermactor secondary air is misdirected.
46  
X
  DIS coil pack 1 circuit failure or coil 2 primary circuit failure.
   
X
Thermactor air not bypassed during self test.
47
X
    4WD switch closed.
   
X
Measured air flow too low at base idle.
48  
X
  Loss of IDM, left side.
   
X
Measured air flow too high at base idle.
49  
X
  SPOUT signal default to 10 BTDC.
 
X
  1 – 2 shift error (E4OD).
50    
X
Cylinder #5 Failed Cylinder Balance Test.
51
X
X
  ECT sensor signal is greater than the Self-Test maximum of 4.6 volts.
52
X
X
X
Power steering pressure switch always open or closed.
53
X
    TPS circuit above maximum 4.5 volts.
 
X
  TPS circuit has intermittently failed above maximum 4.5 volts.
54
X
X
  ACT sensor signal is greater than the Self-Test maximum of 4.6 volts.
55    
X
Keyed power input to processor is open.
56
X
X
  MAF circuit above maximum voltage of 4.5volts.
X
X
  TOT sensor output is greater than Self-Test maximum value of 4.8 volts.
57
X
    Octane adjust service pin in use / circuit grounded.
 
X
  AXOD Neutral pressure switch circuit failed open.
58
X
X
  VAT indicated -40F / circuit open.

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

Codes 10-32
Codes 59-74
Codes 75-99
Three Digit Codes

 
 
 
 
 
 
 
 

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