Medium and Heavy Trucks
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Hi Matt, My name is***** will be glad to try to help. What engine make and model in your truck and what are the fault code numbers you have?
Thanks for the update. Try this procedure and let me know what you get for 2 digit flash codes.
Diagnostic Flash Code Retrieval
Diagnostic LampUse the diagnostic Lamp or a Caterpillar electronic service tool to determine the diagnostic flash code.Use the following procedure to retrieve the flash codes from the check engine light:Turn the ignition key switch to the On position/ Engine OFF.Turn the cruise control ON/OFF switch to the OFF position.Move the SET/RESUME switch to either position. Hold that position until the yellow lamp begins to flash.The yellow lamp will flash in order to indicate a two digit flash code and the SET/RESUME switch may be released. The sequence of flashes represents the system diagnostic message. Count the first sequence of flashes in order to determine the first digit of the flash code. After a two second pause, the second sequence of flashes will identify the second digit of the flash code.Any additional flash codes will follow after a pause. These codes will be displayed in the same manner. Flash Code 55 indicates that No Detected Faults have occurred since the ignition key switch has been turned to the ON position.
Verify your coolant level is above the sensor and if so check the sensor wiring and connector pins for damage and loss of continuity in the circuit from damaged wiring. If it is okay, replace the faulty level sensor.
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