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Suspended Front Axle (SFA) Diagnostic Trouble
Codes
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Diagnostic Trouble Code
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Display
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Solution
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SFA 158.4
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Front Suspension System
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Supply voltage low. Reduce electrical load or increase engine
RPM to attempt vehicle recovery.
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SFA 168.4
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Front Suspension System
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Supply voltage low. Reduce electrical load or increase engine
RPM. Power down and check fuse. Restart engine to attempt vehicle
recovery.
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SFA 629.12
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Front Suspension System
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Suspension control unit fault. Restart engine to attempt vehicle
recovery.
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SFA 630.2
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Front Suspension System
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Calibration fault.
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SFA 630.13
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Front Suspension System
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Calibration fault.
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SFA 1079.3
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Front Suspension System
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Supply voltage high. Restart engine to attempt vehicle recovery.
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SFA 1079.4
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Front Suspension System
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Supply voltage low. Restart engine to attempt vehicle recovery.
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SFA 2003.9
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Communication System
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Transmission control unit communication fault. Restart engine
to attempt vehicle recovery.
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SFA 2005.9
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Communication System
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Armrest control unit communication fault. Restart engine to
attempt vehicle recovery.
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SFA 2049.9
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Communication System
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Cab control unit communication fault. Restart engine to attempt
vehicle recovery.
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SFA 2071.9
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Communication System
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Chassis control unit communication fault. Restart engine to
attempt vehicle recovery.
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SFA 2602.18
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Front Suspension System
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Hydraulic oil level low. Limit hydraulic use to allow oil reservoir
to refill. Check oil level according to Operator's Manual procedure.
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SFA 522287.5
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Front Suspension System
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Unlocking valve solenoid circuit current low. Restart engine
to attempt vehicle recovery.
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SFA 522287.6
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Front Suspension System
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Unlocking valve solenoid circuit current high. Restart engine
to attempt vehicle recovery.
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SFA 522288.5
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Front Suspension System
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Locking valve solenoid circuit current low. Restart engine to
attempt vehicle recovery.
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SFA 522288.6
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Front Suspension System
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Locking valve solenoid circuit current high. Restart engine
to attempt vehicle recovery.
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SFA 522290.2
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Front Suspension System
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Suspension calibration failed. Repeat calibration.
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SFA 522290.3
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Front Suspension System
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Position sensor voltage high. Restart engine to attempt vehicle
recovery.
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SFA 522290.4
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Front Suspension System
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Position sensor voltage low. Restart engine to attempt vehicle
recovery.
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SFA 523368.2
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Front Suspension System
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Control unit fault. Restart engine to attempt vehicle recovery.
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SFA 523652.2
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Hydraulic System
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Incorrect or failed wiring harness connection.
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SFA 523902.7
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Front Suspension System
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Raise motion has stalled.
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SFA 523903.7
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Front Suspension System
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Lower motion has stalled.
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SFA 523910.2
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Front Suspension System
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Control unit fault. Restart engine to attempt vehicle recovery.
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SFA 523948.5
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Front Suspension System
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Raise circuit current low. Restart engine to attempt vehicle
recovery.
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SFA 523948.6
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Front Suspension System
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Raise circuit current high. Restart engine to attempt vehicle
recovery.
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SFA 523949.5
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Front Suspension System
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Lower control circuit current low. Restart engine to attempt
vehicle recovery.
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SFA 523949.6
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Front Suspension System
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Lower control circuit current high. Restart engine to attempt
vehicle recovery.
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SFA 523950.2
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Front Suspension System
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Suspension calibration failed. Repeat calibration.
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SFA 523950.3
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Front Suspension System
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Position sensor voltage high. Restart engine to attempt vehicle
recovery.
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SFA 523950.4
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Front Suspension System
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Position sensor voltage low. Restart engine to attempt vehicle
recovery.
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SFA 523950.13
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Front Suspension System
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Calibration fault.
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SFA 523974.2
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Front Suspension System
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Pressure sensor fault. Suspension calibration failed. Repeat
calibration.
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SFA 523974.3
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Front Suspension System
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Pressure sensor voltage high. Restart engine to attempt vehicle
recovery.
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SFA 523974.4
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Front Suspension System
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Pressure sensor voltage low. Restart engine to attempt vehicle
recovery.
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SFA 524016.4
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Front Suspension System
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Supply voltage low. Reduce electrical load or increase engine
RPM to attempt vehicle recovery.
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SFA 600006.31
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Front Suspension System
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Vehicle controls not operating correctly.
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