Diagnostic trouble codes ECU 128 on Freightliner trucks usually indicate an engine problem. ECU code 128 may appear on the display if the engine control system has detected a malfunction or error in the engine.
Some of the more common causes of ECU 128 code Freightliner trucks include:
- Oil Pressure Sensor Fault: If the oil pressure sensor is faulty, the engine control system may output fault code 128.
- Engine Coolant Temperature Sensor Fault: If the engine coolant temperature sensor is faulty, the engine control system may output ECU error code 128.
- Throttle position sensor malfunction: If the throttle position sensor is malfunctioning, the engine control system may issue ECU code 128.
- Air Pressure Sensor Fault: If the air pressure sensor is faulty, the engine control system may issue ECU code 128.
- Fuel injection system malfunction: If the fuel injection system is malfunctioning, the engine control system may issue fault code 128.
- Malfunction of the electronic control unit of the engine: If the electronic control unit of the engine is defective, the engine control system may issue code ECU 128.
In the event of an ECU 128 code Freightliner truck, it is recommended that you contact a Freightliner Authorized Service Center to diagnose and correct the problem.
