P1DFF – Battery Condition Monitor Module Relay B Stuck On

P1DFF Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1DFF Possible Causes

Faulty Battery Condition Monitor Module Relay B,Battery Condition Monitor Module Relay B harness is open or shorted,Battery Condition Monitor Module Relay B circuit poor electrical connection

P1DFF Description

The battery condition monitor module commands IGHLDB relay to turn ON or permit it to turn OFF. Normally, when IGHLDB relay is OFF, the battery condition monitor module is in sleep mode. When the battery condition monitor module remains powered for a specified duration after the battery condition monitor module commands IGHLDB relay to turn OFF, a malfunction is detected and a DTC is stored.