Conditions for Setting the DTC

B2455 02 

The vehicle communication interface control module detects an short to ground in the cellular phone microphone signal circuit for 10 seconds or greater.

B2455 04 

The following conditions will set this DTC:

• The vehicle communication interface control module detects an open/high resistance in the cellular phone microphone signal circuit for 10 seconds or greater.
• The vehicle communication interface control module detects an open/high resistance in the low reference circuit for 10 seconds or greater.