B172C Code: Meaning, Causes, and Symptoms | OBD2 Codes

B172C – Roof Status Signal Trunk

 

B172C Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B172C Possible Causes

 

Faulty BOSE Amplifier and Telephone Adapter Unit,BOSE Amplifier and Telephone Adapter Unit harness is open or shorted,BOSE Amplifier and Telephone Adapter Unit circuit poor electrical connection,Faulty Soft Top Control Unit

 

B172C Description

 

The Soft Top Control Unit transmits roof position signal to BOSE Amplifier and Telephone Adapter Unit (Without NAVI). The BOSE Amplifier uses this signal for sound equalizer automatic switching function. The OBDII code sets when the BOSE Amplifier and Telephone Adapter Unit (Without NAVI) circuit is short to power.