ECU 128 fault code on Freightliner Trucks

The ECU 128 trouble code on Freightliner trucks typically indicates an engine problem. When code 128 appears on the display, it means that the engine control system has detected a malfunction or error in the engine.

Common causes of ECU 128 code on Freightliner trucks include:

1. Oil Pressure Sensor Fault: A faulty oil pressure sensor can trigger fault code 128 in the engine control system.
2. Engine Coolant Temperature Sensor Fault: A malfunctioning engine coolant temperature sensor can result in ECU error code 128.
3. Throttle Position Sensor Malfunction: If the throttle position sensor is not functioning properly, the engine control system may generate ECU code 128.
4. Air Pressure Sensor Fault: A faulty air pressure sensor can cause the engine control system to display ECU code 128.
5. Fuel Injection System Malfunction: If the fuel injection system is experiencing issues, the engine control system may produce fault code 128.
6. Engine Electronic Control Unit Malfunction: A defective engine electronic control unit can lead to the engine control system issuing ECU code 128.

If you encounter an ECU 128 code on your Freightliner truck, it is advisable to seek assistance from a Freightliner Authorized Service Center. They have the expertise to diagnose and resolve the problem effectively.