Causes and Fixes Chevy P305F Code: Dual Battery Control Module Performance

How to fix a Chevrolet P305F Code: Dual Battery Control Module Performance
Dual Battery Control Module: amzn.to/48wD42R
Service Information
The engine control module (ECM) identifies that the voltage during engine crank at the ignition input (Auxiliary battery voltage) of the ECM is below 8.90 volts for 2 out of 3 start events.
Possible Causes of a Chevy P305F Code:
Aux Battery (Most Common Cause)
Main Battery
Bad Connections
Blown Fuse
Dual Battery Control Module (DBCM)
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[@DavidAdrian-cr9pu]

Check the fuses, mines was the 175 amp was blown

[@gregorysalazar6425]

Where's the fuse located?

[@andrewganster1568]

Old battery 12.65 v. New battery 12.88v. Is the old battery good?

[@solojones8774]

My car radio is turning off & on but both batteries are good

[@casperhayden8286]

Any fix having same issue

[@brevooo]

Mines is doing the same

[@DavidAdrian-cr9pu]

@@casperhayden8286yes I figured it out. The 175 amp fuse for my Malibu was blown and needed to be replaced.

[@javierorozco4260]

Is this why the remote start might not work?

[@Slickrick1995]

Can a bad auxiliary battery cause the car to not start?

[@luna0577]

My 2015 chevy malibu has no power at all what can cause that

[@HVAC_Mechanic]

It may be in Limp Mode, which will need a scan for error codes to know why.

[@eltumbado8x059]

My two and I already the code I was getting I changed map sensor and Evap canister and I still get the same code know I got this code p305F but i haven’t got no issues it star up right away it just a limp mode while driving