B15EC Code: Meaning, Causes, and Symptoms | OBD2 Codes

B15EC – Backup Battery Degradation

 

B15EC Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B15EC Possible Causes

 

Faulty Back-Up Battery (BUB),Back-Up Battery (BUB) harness is open or shorted,Back-Up Battery (BUB) circuit poor electrical connection

 

B15EC Description

 

This Diagnostic Trouble Code (DTC) is set when the Data Communication Module (DCM) (Telematics Transceiver) detects either of the following conditions: The Back-Up Battery (BUB) charge level becomes less than the criteria, Automatic Collision Notification (ACN) occurred. When this DTC is set, the BUB must be replaced.