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Engine Control Unit (ECU) Diagnostic Trouble
Codes
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Diagnostic Trouble Code
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Display
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Solution
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ECU 94.3
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Engine System
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Fuel pressure sensor voltage high.
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ECU 94.4
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Engine System
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Fuel pressure sensor voltage low.
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ECU 94.17
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Engine System
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Fuel pressure low.
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ECU 97.3
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Engine System
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Water separator sensor voltage high.
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ECU 97.4
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Engine System
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Water separator sensor voltage low.
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ECU 97.16
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Engine Water Separator Full
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Engine power limited. Drain water.
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ECU 100.4
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Engine System
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Engine oil pressure sensor voltage low.
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ECU 100.18
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Engine Oil Pressure Low
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Check engine oil level.
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ECU 102.3
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Engine System
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Intake manifold pressure sensor voltage high.
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ECU 102.4
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Engine System
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Intake manifold pressure sensor voltage low.
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ECU 103.0
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Engine System
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Turbocharger speed extremely high. Reduce engine speed and load.
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ECU 103.5
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Engine System
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Turbocharger speed sensor circuit fault.
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ECU 103.8
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Engine System
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Turbocharger speed message fault.
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ECU 100.1
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Engine Oil Pressure Low
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Oil Pressure Extremely low. Check oil level.
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ECU 105.0
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Engine Air Temperature High
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Reduce engine load. Check cooling system for debris.
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ECU 105.3
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Engine System
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Intake manifold air temperature sensor voltage high.
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ECU 105.4
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Engine System
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Intake manifold air temperature sensor voltage low.
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ECU 105.16
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Engine Air Temperature High
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Intake manifold air temperature high. Reduce engine speed and
load.
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ECU 100.31
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Engine Oil Pressure
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Unexpected engine oil pressure with engine off.
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ECU 102.2
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Engine System
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Intake manifold pressure sensor fault.
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ECU 103.31
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Engine System
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Turbocharger speed sensor communication fault.
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ECU 105.15
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Engine Air Temperature High
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Intake manifold air temperature high.
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ECU 107.0
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Engine Air Filter Restricted
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Clean or replace air filter.
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ECU 108.2
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Engine System
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Barometric pressure sensor fault.
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ECU 110.15
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Engine Coolant Temperature High
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Reduce engine speed and load. Check cooling system for debris.
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ECU 110.3
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Engine System
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Coolant temperature sensor voltage high.
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ECU 110.4
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Engine System
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Coolant temperature sensor voltage low.
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ECU 110.16
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Engine Coolant Temperature High
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Reduce engine speed and load. Check cooling system for debris.
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ECU 110.17
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Engine Coolant Temperature Low
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Allow coolant temperature to increase.
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ECU 110.0
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Engine Coolant Temperature High
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Coolant temperature extremely high. Reduce engine load. Check
cooling system for debris.
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ECU 157.3
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Engine System
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Fuel rail pressure sensor voltage high.
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ECU 157.4
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Engine System
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Fuel rail pressure sensor voltage low.
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ECU 152.14
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Engine System
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Engine control unit fault.
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ECU 152.16
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Engine System
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Engine control unit fault.
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ECU 157.17
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Engine System
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Fuel rail pressure low.
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ECU 158.17
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Engine System
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Engine control unit fault.
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ECU 174.3
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Engine System
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Fuel temperature sensor voltage high.
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ECU 174.0
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Fuel Temperature High
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Check cooling system for debris.
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ECU 189.0
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Vehicle Controls
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Vehicle identification fault. Engine Speed Derated.
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ECU 190.0
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Engine Speed High
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Reduce engine speed.
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ECU 412.0
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Engine System
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EGR temperature extremely high.
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ECU 640.31
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Engine System
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Engine shutdown command.
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ECU 1136.0
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Engine System
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Engine control unit internal temperature high.
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ECU 1180.0
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Engine System
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Exhaust temperature high. Reduce engine speed and load. Check
cooling system for debris.
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ECU 2630.0
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Engine System
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Charge air cooler temperature high. Reduce engine speed and
load. Check cooling system for debris.
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ECU 3509.3
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Engine System
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Engine control unit sensor supply voltage high.
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ECU 3509.4
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Engine System
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Engine control unit sensor supply voltage low.
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ECU 157.10
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Engine System
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Fuel rail pressure abnormal fluctuation.
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ECU 174.4
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Engine System
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Fuel temperature sensor voltage low.
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ECU 174.16
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Fuel Temperature High
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Check cooling system for debris.
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ECU 237.2
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Identification System
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Vehicle identification numbers do not match between control
units.
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ECU 237.13
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Identification System
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Vehicle identification numbers do not match between control
units.
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ECU 237.31
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Identification System
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Vehicle identification fault.
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ECU 412.3
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Engine System
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EGR temperature sensor voltage high.
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ECU 412.4
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Engine System
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EGR temperature sensor voltage low.
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ECU 412.16
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Engine System
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EGR temperature high. Reduce engine speed and load.
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ECU 611.3
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Engine System
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Fuel injector circuit voltage high.
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ECU 611.4
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Engine System
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Fuel injector circuit voltage low.
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ECU 627.1
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Engine System
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Fuel injector circuits current low.
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ECU 629.12
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Engine System
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Engine control unit fault. Restart engine to attempt vehicle
recovery.
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ECU 636.5
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Engine System
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Camshaft position sensor circuit fault.
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ECU 636.6
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Engine System
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Camshaft position sensor circuit fault.
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ECU 637.2
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Engine System
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Crankshaft position sensor circuit fault.
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ECU 637.5
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Engine System
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Crankshaft position sensor circuit fault.
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ECU 637.6
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Engine System
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Crankshaft position sensor circuit fault.
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ECU 637.7
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Engine System
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Crankshaft position sensor circuit fault.
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ECU 637.8
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Engine System
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Crankshaft position sensor communication fault.
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ECU 640.11
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Engine System
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Tracks control communication fault.
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ECU 641.4
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Engine System
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Turbocharger actuator supply voltage low.
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ECU 641.12
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Engine System
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Turbocharger actuator communication fault.
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ECU 641.13
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Engine System
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Turbocharger actuator fault.
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ECU 641.16
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Engine System
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Turbocharger actuator temperature high. Reduce engine speed
and load.
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ECU 647.5
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Fan System
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Engine fan drive circuit fault.
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ECU 647.7
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Fan System
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Engine fan drive circuit fault.
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ECU 651.5
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Engine System
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Injector #1 circuit current low.
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ECU 651.6
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Engine System
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Injector #1 circuit current high.
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ECU 651.7
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Engine System
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Injector #1 fuel flow low.
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ECU 652.5
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Engine System
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Injector #2 circuit current low.
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ECU 652.6
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Engine System
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Injector #2 circuit current high..
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ECU 652.7
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Engine System
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Injector #2 fuel flow low.
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ECU 653.5
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Engine System
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Injector #3 circuit current low.
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ECU 653.6
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Engine System
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Injector #3 circuit current high.
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ECU 653.7
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Engine System
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Injector #3 fuel flow low.
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ECU 654.5
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Engine System
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Injector #4 circuit current low.
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ECU 654.6
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Engine System
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Injector #4 circuit current high.
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ECU 654.7
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Engine System
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Injector #4 fuel flow low.
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ECU 655.5
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Engine System
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Injector #5 circuit current low.
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ECU 655.6
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Engine System
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Injector #5 circuit current high.
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ECU 655.7
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Engine System
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Injector #5 fuel flow low.
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ECU 656.5
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Engine System
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Injector #6 circuit current high.
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ECU 656.6
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Engine System
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Engine system not operating correctly. Reference diagnostic
procedure in Technical Manual.
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ECU 656.7
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Engine System
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Injector #6 fuel flow low.
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ECU 1110.31
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Engine System
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Engine Protection Shutdown.
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ECU 1136.16
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Engine System
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Engine control unit internal temperature high.
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ECU 1180.16
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Engine System
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Exhaust temperature high.
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ECU 1347.3
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Engine System
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High pressure fuel pump control valve voltage high.
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ECU 1347.5
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Engine System
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High pressure fuel pump control valve circuit current low.
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ECU 1347.7
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Engine System
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High pressure fuel pump not able to meet required pressure.
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ECU 2630.3
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Engine System
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Charge air cooler outlet temperature sensor voltage high.
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ECU 2630.4
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Engine System
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Charge air cooler outlet temperature sensor voltage low.
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ECU 2630.16
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Engine System
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Charge air cooler outlet temperature high. Reduce engine speed
and load. Check cooling system for debris.
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ECU 2659.2
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Engine System
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EGR sensor circuit fault.
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ECU 2659.15
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Engine System
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EGR sensor circuit fault.
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ECU 2659.17
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Engine System
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EGR sensor circuit fault.
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ECU 2790.16
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Engine System
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Turbocharger outlet temperature high. Reduce engine speed and
load.
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ECU 2791.3
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Engine System
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EGR valve position sensor voltage high.
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ECU 2791.4
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Engine System
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EGR valve position sensor voltage low.
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ECU 2791.7
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Engine System
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EGR valve position fault.
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ECU 2791.13
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Engine System
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EGR valve position fault.
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ECU 2795.7
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Engine System
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Turbocharger actuator not reaching expected position.
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ECU 3510.3
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Engine System
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Engine control unit sensor supply voltage high.
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ECU 3510.4
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Engine System
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Engine control unit sensor supply voltage low.
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ECU 3511.3
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Engine System
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Engine control unit sensor supply voltage high.
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ECU 3511.4
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Engine System
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Engine control unit sensor supply voltage low.
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ECU 3512.3
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Engine System
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Engine control unit sensor supply voltage high.
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ECU 3512.4
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Engine System
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Engine control unit sensor supply voltage low.
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ECU 3513.3
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Engine System
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Engine control unit sensor supply voltage high.
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ECU 3513.4
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Engine System
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Engine control unit sensor supply voltage low.
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ECU 152.12
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Engine system
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Engine control unit fault.
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ECU 412.15
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Engine System
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Fuel temperature high. Check cooling system for debris.
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ECU 636.2
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Engine System
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Camshaft position sensor fault.
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ECU 636.8
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Engine System
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Camshaft position sensor communication fault.
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ECU 636.10
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Engine System
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Camshaft position sensor fault.
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ECU 637.10
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Engine System
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Camshaft position sensor fault.
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ECU 651.2
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Engine System
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Injector #1 fault.
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ECU 651.13
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Engine System
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Injector #1 calibration fault.
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ECU 652.2
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Engine System
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Injector #2 fault.
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ECU 652.13
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Engine System
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Injector #2 calibration fault.
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ECU 653.2
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Engine System
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Injector #3 fault.
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ECU 653.13
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Engine System
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Injector #3 calibration fault.
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ECU 654.2
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Engine System
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Injector #4 fault.
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ECU 654.13
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Engine System
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Injector #4 calibration fault.
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ECU 655.2
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Engine System
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Injector #5 fault.
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ECU 655.13
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Engine System
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Injector #5 calibration fault.
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ECU 656.2
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Engine System
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Injector #6 fault.
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ECU 656.13
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Engine System
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Injector #6 calibration fault.
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ECU 1075.5
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Fuel Supply System
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Fuel lift pump current low.
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ECU 1075.12
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Fuel Supply System
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Fuel lift pump fault.
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ECU 1172.3
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Engine System
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Turbocharger inlet temperature sensor voltage high.
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ECU 1172.4
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Engine System
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Turbocharger inlet temperature sensor voltage low.
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ECU 1568.2
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Engine System
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Engine system not operating correctly.
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ECU 1569.31
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Engine Power Derated
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Engine power derate condition exists.
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ECU 1639.1
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Fan System
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Engine fan speed low. Check fan drive system.
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ECU 1639.16
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Fan Speed High
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Engine fan speed high. Check fan drive system.
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ECU 1639.18
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Fan Speed Low
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Engine fan speed low. Check fan drive system.
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ECU 2005.9
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Communication System
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Armrest control unit communication fault.
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ECU 2005.14
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Communication System
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Armrest control unit communication fault.
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ECU 2005.19
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Communication System
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Armrest control unit communication fault.
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ECU 2030.9
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Communication System
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Engine system not operating correctly.
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ECU 2071.9
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Communication System
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Vehicle controls not operating correctly.
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ECU 2630.15
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Engine System
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Charge air cooler outlet temperature high. Check cooling system
for debris.
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ECU 2791.2
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Engine System
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EGR valve position fault.
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ECU 2791.31
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Engine System
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EGR valve calibration fault.
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ECU 600006.31
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Engine system
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Vehicle controls not operating correctly.
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