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Home >> Chevrolet >> 2017 >> Impala Premier, Gas >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC P305F: Dual Battery Control Module Performance >> Conditions for Setting the DTC
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Conditions for Setting the DTC

The Engine Control Module (ECM) identifies that the voltage during engine crank at the IGN input (auxiliary battery voltage) of the ECM is below 8.90 V for 2 out of 3 start events.