B1021- IPC

DTC - B1021 LOSS OF PCM SERIAL DATA
The IPC is having trouble commenicating with the Powertrain Control Module.

Chart #1 Scan Tool Can't Communicate W/One/More Modules On A Serial Data Bus (Part 1 Of 2):

Chart #1 Scan Tool Can't Communicate W/One/More Modules On A Serial Data Bus (Part 2 Of 2):