need help

[Brian Metzker]

have 2006 liberty ,replaced transmission cooling lines because they were split. replaced filter and put right fluid in(plus lucas treatment )started up. motor revs transmission engages,moves but when stop, it does the same thing,not sure if it did it before I got it,it gives me a U1120 code,and It has a hard knock,

 

[JPNinPA]

What same thing? What has a hard knock?

The engine or transmission or drivetrain?


U1120 means the PCM doesn't receive a vehicle speed signal from the Anti-lock brake Module over the CAN C bus. This can be caused by the ABS module, PCM or something wrong with the can bus. Reset the code and see if it comes back.

 

[Brian Metzker]

I think its the engine that has the knocking,reset codes and it still gives me the U1120