Dtc codes p420, u2011, u1900, c1234, c1145

[Jlattan75]

I have a 2007 Mustang 4.0 convertible. I was able to use a scanner to pull code because I had tcs/abs lights illuminated. Here's what they said;

C1145 speed wheel sensor RF input circuit failure

C1234 speed wheel RF input signal missing

C1145 speed wheel sensor RF input circuit failure

U1900 controller area network communication bus malfunction receive malfunction

U2011 no dtc definition found

P0420 catalyst system efficiency below threshold bank 1

Not really concerned about p0420 I understand that. What in the heck do the rest of these mean? I was having electrical issue and I tracked it down to the sbj. I pulled it and cleaned it and all problems went away. No problems for 200 miles. Just setting idle these lights came on. Please help!?;