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CONTROLS AND INSTRUMENTS
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ENGINE ELECTRONIC CONTROL UNIT
Fault Codes and Descriptions
2-Digit Code Definition
11 Analog Throttle Input High
12 Analog Throttle input Low
18 Engine Coolant Temperature Input High
19 Engine Coolant Temperature Input Low
21 Sensor Supply Voltage High
22 Sensor Supply Voltage Low
23 Engine Oil Pressure Input Voltage High
24 Engine Oil Pressure Input Voltage Low
25 Manifold Air Temperature Input Voltage High
26 Manifold Air Temperature Input Voltage Low
28 ECU Error
32 Signifies Start of Active Fault Codes
33 Signifies Start of Previously Active Fault Codes
37 Fuel Temperature Input Voltage High
38 Fuel Temperature Input Voltage Low
39 Crank Position Input Noise/Pattern Error
42 Engine Overspeed
54 ECU Power Down Error
55 CAN Error
62 Engine Coolant Temperature High-Least Sever
63 Engine Coolant Temperature High-Moderately Severe
64 Engine Oil Pressure Moderately Low
65 Engine Oil Pressure Extremely Low
66 Manifold Air Temperature Moderately High
68 Fuel Derate
69 Engine Coolant Temperature High-Most Severe
71 Pump Control Valve Closure Too Long
72 Pump Control Valve Closure Too Short
73 Pump Solenoid Circuit Open
74 Pump Solenoid Circuit Severely Shorted
75 Pump Control Valve Closure Not Detected
76 Pump Solenoid Circuit Moderately Shorted
77 Pump Solenoid Current High
78 Security Violation
79 Internal ECU Error
81 Fuel Temperature Moderately High
82 Engine Protection Shutdown
83 Auxiliary Engine Shutdown Switch Active
84 ECU Power Down Error / External Derate Active
88 Signifies that No Fault Codes are Stored