I have Freightliner trucks and It's show ''Active Faults 1'' at startup screen. What's does it mean?
If you press and hold the mode button it should beep then you will get the component location. ecu 128 for example is in the engine- mid 136 is the abs. once you see that, press the mode button again and you will get the code. sid 123 for example- press mode button again and you will get the failure code. FL 02, could indicate when it is reading a high or low reading, short or open... etc. once you have the three parts of this code then you should be able to contact your local dealer to find out what the code means. Truck diagnostics are not always easy... active codes really just give technicians a place to start... hope this helps
You need to pull codes ,it can be the engine or abs or on the freightliner side
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