My abs light came on I hooked up my diagnostic machine to my truck and 2 codes came up one was C1155 it says it is the LF Anti Lock Brake Sensor (Electrical/Static). The 2nd code that came up is C1233 and that is the Left Front Wheel Speed Sensor Input Signal Missing. I called one part store to get pricing and they said the same part is coming up when they are typing in brake sensor and speed sensor and they don't know if they are the same thing or not so I called 2 other stores and they told me the same thing so hopefully someone can answer that for me is the LF brake sensor and the left front wheel speed sensor the same sensor ?
My truck is a 97 ford expedtion 4WD 5.4

Both of those codes are related to the LF Wheel Speed Sensor but both codes require verification of the actual fault.
In other words, it could be the sensor but it could also be either the harness or module that is actually faulty.

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Originally Posted by CaptainRich

Both of those codes are related to the LF Wheel Speed Sensor but both codes require verification of the actual fault.
In other words, it could be the sensor but it could also be either the harness or module that is actually faulty.

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My harness and sensor is connected to my hub so I just changed out the whole hub and my problem is fix thanks a lot.