I used a friend’s OBD scanner, to diagnose a TPMS fault on another car. While we were at it we hooked it up to my ‘15 XKR, and after clearing all fails did a few scans, and it constantly gave B1A56-13 Antenna Circuit Fault, . My navigation screen is wonky and has the jitters, and AM/Fm reception is weak, and back up camera is jittery.

The code indicates antenna circuit open.

Since the antenna and other stuff comes from the rear of the car, I’m wondering if there is a common spot where wiring is susceptible to damage.

Any suggestions?

 

The actual antenna, inside the spoiler.

 

I appear to have the same issues. Im getting repeated and consistent DTC code B1A56-13 Permanent Antenna circuit. Its telling me to check for open circuit. I am also getting U200D-14 Control Module output power A, again its telling me to look for an open circuit.

If i ignore it, i eventually get an engine warning light although i dont know whats causing that, on 2 occasions it caused the car to get into a "no crank" situation where the can-bus appears to stop communications to many parts of the car and a hard reset is required.

Did you solve your problem? I have a 2013 XKR.....