Code : U0121
Make : 2006_FORD_FUSION
Description : U0121 2006 FORD FUSION Lost Communication With The Anti-lock Brake System Control Module
Possible causes :
– Damaged CAN communication bus circuit
– Faulty Anti-lock Brake System (ABS)
– Anti-lock Brake System (ABS) harness is open or shorted
– Anti-lock Brake System (ABS) circuit poor electrical connection
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.
